Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Details)

v3.19.3.a.u2
Summary of Significant Accounting Policies - Additional Information (Details) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Jan. 01, 2019
Sep. 05, 2018
Dec. 31, 2017
Aug. 29, 2015
Summary of Significant Accounting Policies [Line Items]            
Depreciation, Depletion and Amortization $ 240,000 $ 272,000        
Cash and Cash Equivalents, at Carrying Value. $ 15,045,000 28,918,000     $ 17,116,000  
Equity Method Investment, Ownership Percentage 83.00%          
Accrued Liabilities $ 700,000 700,000        
Prepaid Expense 48,000 0        
preferred stock accrued dividends 248,000 243,000        
Net Loss Attributable to Non-controlling Interest $ (77,000) $ (54,000)        
Preferred Stock Shares Converted 1,523 6,562        
Right of Use Asset $ 419,000 $ 0 $ 537,000      
Operating Lease Liability $ 249,000 $ 0 $ 939,000      
Series B Preferred Stock [Member]            
Summary of Significant Accounting Policies [Line Items]            
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 6,641,736 7,966,057        
preferred stock accrued dividends $ 525,000 $ 11,681,000        
Accretion of Preferred Stock Deemed Dividend   9,200,000        
Net Loss Attributable to Non-controlling Interest 0 0        
Accretion of preferred discount 525,000 2,500,000        
Series A Preferred Stock [Member]            
Summary of Significant Accounting Policies [Line Items]            
preferred stock accrued dividends $ 248,000 $ 243,000        
Accretion of preferred discount         $ 6,900,000  
Warrant [Member]            
Summary of Significant Accounting Policies [Line Items]            
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 18,714,999 18,915,850        
Options [Member]            
Summary of Significant Accounting Policies [Line Items]            
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount 2,502,012 938,982        
Money Market Accounts [Member]            
Summary of Significant Accounting Policies [Line Items]            
Cash and Cash Equivalents, at Carrying Value. $ 98,000 $ 98,000        
SYN Biomics [Member]            
Summary of Significant Accounting Policies [Line Items]            
Equity Method Investment, Ownership Percentage 83.00%     88.50%    
Noncontrolling Interest, Ownership Percentage by Parent 17.00%     11.50%   8.50%
Net Loss Attributable to Non-controlling Interest $ 2,900,000 $ 2,900,000