XML 59 R48.htm IDEA: XBRL DOCUMENT v3.19.1
Convertible Debt at Fair Value (Narrative) (Details) - USD ($)
3 Months Ended
Mar. 01, 2017
Mar. 31, 2019
Mar. 31, 2018
Mar. 16, 2016
Debt Instrument [Line Items]        
Gain (loss) on derivatives and convertible debt   $ (237,000) $ 447,000  
6.25% Convertible Debt [Member]        
Debt Instrument [Line Items]        
Interest rate   6.25%   6.25%
Principal amount       $ 1,012,000
Number of shares of common stock debt can convert into 97,269      
Maximum ownership percentage of voting stock upon debt conversion       49.00%
Gain (loss) on derivatives and convertible debt   $ (48,000) $ 20,000