XML 49 R35.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 1 - Business Description, Basis of Presentation and Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities     $ 0 $ 0 $ 0
Inventory, Net     14,415 11,377  
Inventory, Noncurrent     $ 8,708 1,664  
Number of Reporting Units     1    
Goodwill, Impairment Loss $ 12,724   $ 12,724
Impairment of Intangible Assets, Finite-lived     $ 769
Product Return Policy, Number Of Days     180 days    
Product Return Policy, Not to Exceed Net Purchases During Preceeding Quarter, Percent     15.00%    
Advertising Expense     $ 1,079 836 $ 728
Deferred Tax Assets, Valuation Allowance     $ 2,236 1,404  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent     35.00%    
Increase (Decrease) of Net Deferred Tax Assets     $ (3,300)    
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability     3,300    
Scenario, Forecast [Member]          
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent   21.00%      
Customer Relationships [Member]          
Impairment of Intangible Assets, Finite-lived     $ 769    
Minimum [Member]          
Property, Plant and Equipment, Useful Life     2 years    
Finite-Lived Intangible Asset, Useful Life     3 years    
Maximum [Member]          
Property, Plant and Equipment, Useful Life     10 years    
Finite-Lived Intangible Asset, Useful Life     10 years    
Advance Replacement Units [Member]          
Inventory, Net     $ 76 $ 21