Quarterly report pursuant to Section 13 or 15(d)

New Accounting Standards Implemented (Details Textual)

v3.8.0.1
New Accounting Standards Implemented (Details Textual) - USD ($)
1 Months Ended 3 Months Ended
Jan. 02, 2018
Mar. 31, 2018
Dec. 31, 2017
Oct. 16, 2017
Mar. 31, 2017
Revenue from Grants   $ 2,548,000     $ 0
Cumulative Effect on Retained Earnings, Net of Tax   3,663,000      
Royalty Revenue   50,000     35,000
Restricted Cash and Cash Equivalents   280,000 $ 0   $ 0
Grants Receivable   13,850,000      
Deferred Revenue, Revenue Recognized   2,600,000      
Deferred Revenue, Current $ 2,612,000 544,000 3,214,000    
Proceeds From Grant Received   $ 500,000 $ 2,600,000 $ 3,100,000  
Accounting Standards Update 2014-09 [Member]          
Stockholders' Equity, Period Increase (Decrease) $ 3,700,000