General form of registration statement for all companies including face-amount certificate companies

Note 4 - Stockholders' Equity 10k (Details Textual)

v3.19.2
Note 4 - Stockholders' Equity 10k (Details Textual) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 12, 2018
May 01, 2016
Oct. 31, 2018
Aug. 31, 2017
Dec. 31, 2016
May 31, 2016
Mar. 31, 2019
Dec. 31, 2018
Mar. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Sep. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period             10 years     10 years    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant             500,000 500,000   500,000    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value                 $ 6.80 $ 9.40 $ 26.80  
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value                   $ 205,000 $ 302,000  
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount             $ 250,000 $ 179,000   $ 179,000    
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition             292 days     1 year 328 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross             40,000   0 24,432    
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price             $ 8.60     $ 22.60    
Private Placement [Member]                        
Class of Warrant or Right, Issued During Period     150,000                  
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 15                  
Stock Issued During Period, Shares, New Issues     150,000                  
Shares Issued, Price Per Share     $ 14                  
Proceeds from Issuance of Private Placement     $ 2,100,000                  
Warrants and Rights Outstanding, Term     5 years 182 days                  
Private Placement [Member] | Series A 4.5% Convertible Preferred Stock [Member]                        
Stock Issued During Period, Shares, New Issues         1,000,000              
Preferred Stock, Dividend Rate, Percentage         4.50%              
Convertible Preferred Stock, Issuable Upon Conversion of All Shares         194,369              
Stock Purchase Warrants [Member]                        
Class of Warrant or Right, Issued During Period   87,309   112,500   87,309 25,000          
Class of Warrant or Right, Outstanding       149,135       149,135   149,135    
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 11.40       $ 6         $ 40
Warrants and Rights Outstanding, Term             2 years 182 days          
Stock Purchase Warrants Issued to Placement Agent [Member]                        
Class of Warrant or Right, Issued During Period     9,000         9,000        
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 17.50         $ 17.50   $ 17.50    
Warrants and Rights Outstanding, Term               5 years   5 years    
Stock Purchase Warrants Issued to Investor [Member]                        
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 15                  
Restricted Stock Units (RSUs) [Member]                        
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition                   182 days    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding             $ 15,200 $ 17,000   $ 17,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value                   $ 50,000 25,000  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested                     $ 23,000  
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Exercised             0     0    
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount               25,000   $ 25,000    
Restricted Stock [Member]                        
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition             91 days     182 days    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding               7,000   $ 7,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested             $ 5,100     84,000    
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount             $ 12,500 $ 25,000   $ 25,000    
Inducement Award Stock Option Plan [Member] | Chief Executive Officer [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross 40,000                      
Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price $ 8.50                      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares 10,000                      
Inducement Award Stock Option Plan [Member] | Chief Executive Officer [Member] | Vest Over Two Year Period [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares 10,000                      
Inducement Award Stock Option Plan [Member] | Chief Executive Officer [Member] | Vest Based on Achiement of Certain Milestones [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested, Number of Shares 20,000                      
Inducement Award Stock Option Plan [Member] | Chief Executive Officer [Member] | Share-based Payment Arrangement, Option [Member]                        
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 10 years