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

Note 2 - Significant Accounting Policies and Basis of Presentation (Details Textual)

v3.19.2
Note 2 - Significant Accounting Policies and Basis of Presentation (Details Textual) - USD ($)
shares in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Dec. 31, 2017
Jan. 01, 2019
Cost Reimbursements from SBIR Grant as Offset to Research and Development Expenses $ 95,000 $ 84,000 $ 538,000 $ 41,000  
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 0.7 0.5 0.6 0.5  
Lessee, Operating Lease, Liability, Payments, Due, Total $ 49,600        
Operating Lease, Payments $ 29,800        
Lessee, Operating Lease, Discount Rate 12.75%        
Operating Leases, Rent Expense, Net, Total $ 47,300 $ 47,100      
Operating Leases, Rent Expense, Sublease Rentals 62,200        
Sublease Income 24,200        
Accounting Standards Update 2016-02 [Member]          
Operating Lease, Right-of-Use Asset         $ 53,000
Operating Lease, Liability, Total         $ 75,700
Short-term Leases [Member]          
Operating Leases, Rent Expense, Net, Total 16,900        
Other Noncurrent Assets [Member]          
Operating Lease, Right-of-Use Asset 33,900        
Other Current Liabilities [Member]          
Operating Lease, Liability, Total $ 48,100        
Minimum [Member]          
Lessee, Operating Lease, Term of Contract 1 year