Income Taxes (Details) (USD $)	3 Months Ended								12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
Current tax expense [Abstract]
Federal									$ 3,987,000	$ 4,476,000	$ 4,797,000
State									256,000	379,000	718,000
Foreign									480,000	448,000	267,000
Total current tax expense									4,723,000	5,303,000	5,782,000
Deferred tax expense (benefit) [Abstract]
Federal									(24,119,000)	1,039,000	1,206,000
State									(2,535,000)	494,000	821,000
Foreign									211,000	(64,000)	0
Total deferred tax expense (benefit)									(26,443,000)	1,469,000	2,027,000
Total income tax (benefit) expense	(27,953,000)	946,000	3,934,000	1,353,000	1,141,000	1,976,000	1,813,000	1,842,000	(21,720,000)	6,772,000	7,809,000
Assets [Abstract]
Accounts receivable valuation	4,690,000				4,465,000				4,690,000	4,465,000
Allowance for customer incentives	1,216,000				626,000				1,216,000	626,000
Inventory obsolescence reserve	962,000				839,000				962,000	839,000
Stock options	1,551,000				1,239,000				1,551,000	1,239,000
Property and equipment, net	468,000				492,000				468,000	492,000
Intangibles, net	701,000				0				701,000	0
Estimate for returns	10,831,000				0				10,831,000	0
Deferred core revenue	10,255,000				14,524,000				10,255,000	14,524,000
Claims payable	174,000				288,000				174,000	288,000
Acquisition cost	0				35,000				0	35,000
Accrued compensation	1,820,000				1,310,000				1,820,000	1,310,000
Net operating losses	32,214,000				29,195,000				32,214,000	29,195,000
Other	1,892,000				1,165,000				1,892,000	1,165,000
Total deferred tax assets	66,774,000				54,178,000				66,774,000	54,178,000
Liabilities [Abstract]
Prepaid expenses	(639,000)				(363,000)				(639,000)	(363,000)
Intangibles, net	0				(3,812,000)				0	(3,812,000)
Cancellation for indebtedness	(1,412,000)				0				(1,412,000)	0
Estimate for returns	0				(3,287,000)				0	(3,287,000)
Other	(2,253,000)				(496,000)				(2,253,000)	(496,000)
Total deferred tax liabilities	(4,304,000)				(7,958,000)				(4,304,000)	(7,958,000)
Less valuation allowance	(30,296,000)				(40,716,000)				(30,296,000)	(40,716,000)
Net deferred tax assets	32,174,000				5,504,000				32,174,000	5,504,000
Net current deferred income tax asset	34,711,000				3,647,000				34,711,000	3,647,000
Net long-term deferred income tax assets	(2,537,000)				1,857,000				(2,537,000)	1,857,000
Current deferred income tax liabilities	145,000				146,000				145,000	146,000
Federal net operating loss carryforwards	63,400,000								63,400,000
State net operating loss carryforwards	11,500,000								11,500,000
Canadian net operating loss carryforwards	119,900,000								119,900,000
Net operating loss carryforwards expire period									2020 and 2032
Difference between income tax expense at the federal statutory rate and effective tax rate [Abstract]
Statutory federal income tax rate (in hundredths)									34.00%	34.00%	34.00%
State income tax rate, net of federal benefit (in hundredths)									1.00%	(1.00%)	3.00%
Change in deferred tax rate (in hundredths)									0.00%	0.00%	2.00%
Foreign income taxed at different rates (in hundredths)									(9.00%)	(12.00%)	(1.00%)
Goodwill impairment									(16.00%)	0.00%	0.00%
Valuation allowance (in hundredths)									9.00%	(36.00%)	0.00%
Other income tax (in hundredths)									0.00%	(1.00%)	1.00%
Total (in hundredths)									19.00%	(16.00%)	39.00%
Unrecognized tax benefits [Roll Forward]
Balance at beginning of period				3,613,000				576,000	3,613,000	576,000	711,000
Additions based on tax positions related to the current year									227,000	116,000	128,000
Additions for tax positions of prior year									57,000	2,997,000	298,000
Reductions for tax positions of prior year									(440,000)	(76,000)	(561,000)
Settlements									0	0	0
Balance at end of period	3,457,000				3,613,000				3,457,000	3,613,000	576,000
Unrecognized tax benefits that would impact effective tax rate	1,780,000				1,783,000				1,780,000	1,783,000	389,000
Recognized interest and penalties									36,000	160,000	(4,000)
Interest and penalties accrued	$ 460,000				$ 424,000				$ 460,000	$ 424,000