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Income Taxes (Details) - USD ($)
 3 Months Ended 12 Months Ended
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2016
Mar. 31, 2015
Mar. 31, 2014
Current tax expense [Abstract]                      
Federal                 $ 12,400,000 $ 1,523,000 $ 4,564,000
State                 1,995,000 1,100,000 614,000
Foreign                 803,000 527,000 599,000
Total current tax expense                 15,198,000 3,150,000 5,777,000
Deferred tax (benefit) expense [Abstract]                      
Federal                 (2,929,000) 5,553,000 2,477,000
State                 (757,000) 93,000 (162,000)
Foreign                 (33,000) 272,000 (759,000)
Total deferred tax (benefit) expense                 (3,719,000) 5,918,000 1,556,000
Total income tax expense $ 4,658,000 $ 6,451,000 $ (898,000) $ 1,268,000 $ 2,110,000 $ 2,826,000 $ 1,418,000 $ 2,714,000 11,479,000 9,068,000 $ 7,333,000
Assets [Abstract]                      
Accounts receivable valuation 6,438,000       3,100,000       6,438,000 3,100,000  
Allowance for customer incentives 769,000       1,296,000       769,000 1,296,000  
Inventory obsolescence reserve 1,431,000       1,056,000       1,431,000 1,056,000  
Stock options 1,714,000       1,931,000       1,714,000 1,931,000  
Intangibles, net 380,000       846,000       380,000 846,000  
Estimate for returns 3,785,000       986,000       3,785,000 986,000  
Accrued compensation 1,485,000       2,563,000       1,485,000 2,563,000  
Net operating losses 2,070,000       3,007,000       2,070,000 3,007,000  
Tax credits 1,660,000       832,000       1,660,000 832,000  
Other 2,583,000       2,154,000       2,583,000 2,154,000  
Total deferred tax assets 22,315,000       17,771,000       22,315,000 17,771,000  
Liabilities [Abstract]                      
Property and equipment, net (1,119,000)       (807,000)       (1,119,000) (807,000)  
Other (2,124,000)       (1,635,000)       (2,124,000) (1,635,000)  
Total deferred tax liabilities (3,243,000)       (2,442,000)       (3,243,000) (2,442,000)  
Less valuation allowance 0       0       0 0  
Net deferred tax assets 19,072,000       15,329,000       19,072,000 15,329,000  
Net current deferred income tax asset 33,347,000       22,998,000       33,347,000 22,998,000  
Net long-term deferred income tax liability (14,315,000)       (7,803,000)       (14,315,000) (7,803,000)  
Net current deferred income tax liability (196,000)       (127,000)       (196,000) (127,000)  
Net long-term deferred income tax asset 236,000       261,000       236,000 $ 261,000  
Federal net operating loss carryforwards 1,878,000               1,878,000    
State net operating loss carryforwards 28,703,000               28,703,000    
Losses attributable to windfall stock option deductions                 1,878,000    
Net benefit to be recorded to APIC when realized                 $ 712,000    
Difference between income tax expense at the federal statutory rate and effective tax rate [Abstract]                      
Statutory federal income tax rate                 35.00% 35.00% 34.00%
State income tax rate, net of federal benefit                 4.00% 2.20% 2.40%
Change in deferred tax rate                 0.00% (0.20%) (1.80%)
Foreign income taxed at different rates                 (0.80%) (0.90%) (7.20%)
Warrants                 8.20% 0.80% 25.70%
Non-deductible executive compensation                 2.20% 3.40% 1.60%
Uncertain Tax Positions                 0.40% 2.50% (2.40%)
Other income tax                 3.10% 1.40% 0.80%
Effective tax rate                 52.10% 44.20% 53.10%
Unrecognized tax benefits [Roll Forward]                      
Balance at beginning of period       $ 1,117,000       $ 540,000 $ 1,117,000 $ 540,000 $ 827,000
Additions based on tax positions related to the current year                 57,000 359,000 71,000
Additions for tax positions of prior year                 217,000 336,000 0
Reductions for tax positions of prior year                 (210,000) (118,000) (358,000)
Settlements                 0 0 0
Balance at end of period 1,181,000       1,117,000       1,181,000 1,117,000 540,000
Unrecognized tax benefits that would impact effective tax rate 678,000       958,000       678,000 958,000 387,000
Recognized interest and penalties                 34,000 (56,000) $ (9,000)
Interest and penalties accrued $ 90,000       $ 56,000       $ 90,000 $ 56,000