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Income Taxes (Tables)
12 Months Ended
Dec. 31, 2018
Income Tax Disclosure [Abstract]  
Schedule of deferred tax assets and liabilities

   2018   2017 
Deferred tax assets:          
Net operating loss carry-forwards   $16,672   $17,359 
Accruals and reserves    263    51 
Deferred revenue    84    143 
Intangibles    486    490 
Other, net    42    39 
           
Fixed assets        13 
Gross tax assets    17,547    18,095 
           
Valuation allowance    (17,547)   (18,095)
           
Net deferred tax assets   $   $ 
Schedule of statutory U.S. federal income tax rate to loss before taxes

   2018   2017 
Income tax benefit at the federal statutory rate   $(209)  $(661)
State income tax benefit    (69)   (135)
NOL expiration    938    118 
Prior year true-ups    (195)   15 
Permanent items and other    81    354 
Tax cuts and Jobs Act Rate Changes        9,090 
Change in valuation allowance    (548)   (8,781)
     Income tax expense   $(2)    $ ─