XML 50 R39.htm IDEA: XBRL DOCUMENT v3.10.0.1
Note 3 - Recent Accounting Pronouncements (Details Textual) - USD ($)
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Oct. 01, 2017
Sep. 30, 2018
Oct. 01, 2017
Jan. 01, 2018
Dec. 31, 2017
Retained Earnings (Accumulated Deficit), Ending Balance $ (114,738,000)   $ (114,738,000)   $ (111,421,000) $ (111,591,000)
Revenue from Contract with Customer, Including Assessed Tax 21,101,000 $ 21,371,000 64,014,000 $ 60,805,000    
Net Income (Loss) Attributable to Parent, Total $ (2,336,000) $ (3,133,000) $ (3,317,000) $ (9,588,000)    
Earnings Per Share, Basic, Total $ (0.11) $ (0.15) $ (0.16) $ (0.47)    
Operating Income (Loss), Total $ (2,014,000) $ (2,755,000) $ (4,182,000) $ (10,579,000)    
Other Nonoperating Income (Expense), Total (56,000) $ (115,000) 1,651,000 1,663,000    
Accounting Standards Update 2014-09 [Member]            
Retained Earnings (Accumulated Deficit), Ending Balance         $ 170,000  
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]            
Retained Earnings (Accumulated Deficit), Ending Balance 285,000   285,000      
Revenue from Contract with Customer, Including Assessed Tax (24,000)   1,002,000      
Net Income (Loss) Attributable to Parent, Total $ (71,000)   $ 115,000      
Earnings Per Share, Basic, Total $ (0.01)   $ 0.01      
Operating Income (Loss), Total $ (71,000)   $ 115,000      
Other Nonoperating Income (Expense), Total $ 0   $ 0      
Accounting Standards Update 2017-07 [Member]            
Operating Income (Loss), Total       299,000    
Other Nonoperating Income (Expense), Total       $ 299,000