Annual report pursuant to Section 13 and 15(d)

Note 8 - Income Taxes - Summary of Temporary Differences and Carryforwards That Give Rise to Deferred Tax Assets and Liabilities (Details)

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Note 8 - Income Taxes - Summary of Temporary Differences and Carryforwards That Give Rise to Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Less: valuation allowance $ (11,370) $ (11,435)
Net deferred Federal tax assets (liabilities) (62)  
Less: valuation allowance (11,370) (11,435)
Net deferred tax assets (liabilities) (62)  
Domestic Tax Authority [Member]      
Bad debt reserves 1,178 1,375  
Stock based compensation 393 305  
Net operating loss 8,025 7,319  
Accrued compensation 218 249  
Inventories 27 18  
Accrued rent 31 30  
Goodwill and intangible assets 2,507 3,323  
Research & development credits 533 533  
Other credits 25 5  
Other 114 103  
Total deferred Federal tax assets 13,051 13,260  
Less: valuation allowance (9,724) (9,599)  
Net deferred tax assets 3,327 3,661  
Depreciation and asset basis differences (3,335) (3,672)  
Other 8 (51)  
Total deferred Federal tax liabilities (3,327) (3,723)  
Net deferred Federal tax assets (liabilities) (62)  
Net deferred state and local tax assets 13,051 13,260  
Less: valuation allowance (9,724) (9,599)  
Net deferred tax assets (liabilities) (62)  
State and Local Jurisdiction [Member]      
Total deferred Federal tax assets 1,646 1,836  
Less: valuation allowance (1,646) (1,836)  
Net deferred state and local tax assets 1,646 1,836  
Less: valuation allowance $ (1,646) $ (1,836)