Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 8,266,000	$ 8,351,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	1,737,000	1,355,000
Amortization of intangible assets	476,000	510,000
Amortization of debt issuance costs	635,000	1,274,000
Write-off of debt issuance costs	5,108,000	0
Amortization of interest on accrued core payments	566,000	0
Loss due to change in fair value measurements using significant unobservable inputs	3,077,000	2,199,000
Gain on redemption of short-term investment	0	(4,000)
Provision for inventory reserves	3,439,000	839,000
Net recovery of customer payment discrepancies	(270,000)	(292,000)
Provision for doubtful accounts	4,552,000	178,000
Deferred income taxes	(3,264,000)	(1,067,000)
Share-based compensation expense	1,786,000	1,697,000
Impact of tax benefit on APIC pool from stock options exercised	0	90,000
Loss on disposals of plant and equipment	0	1,000
Changes in current assets and liabilities:
Accounts receivable	11,481,000	22,398,000
Inventory	2,905,000	(11,576,000)
Inventory unreturned	(2,815,000)	(512,000)
Prepaid expenses and other current assets	2,462,000	427,000
Other assets	(359,000)	(378,000)
Accounts payable and accrued liabilities	(3,830,000)	1,740,000
Customer finished goods returns accrual	3,680,000	722,000
Deferred core revenue	0	(15,065,000)
Long-term core inventory	(47,731,000)	(10,728,000)
Long-term core inventory deposits	26,002,000	(2,196,000)
Accrued core payment	(8,896,000)	0
Other liabilities	956,000	2,963,000
Net cash provided by operating activities	9,963,000	2,926,000
Cash flows from investing activities:
Purchase of plant and equipment	(3,168,000)	(2,551,000)
Purchase of business	(2,701,000)	0
Change in short term investments	(838,000)	(77,000)
Net cash used in investing activities	(6,707,000)	(2,628,000)
Cash flows from financing activities:
Repayment of revolving loan	(15,000,000)	(10,000,000)
Borrowings under revolving loan	22,000,000	0
Borrowings under term loan	25,000,000	0
Repayments of term loan	(85,281,000)	(6,300,000)
Payments for debt issuance costs	(2,337,000)	0
Payments on capital lease obligations	(268,000)	(48,000)
Exercise of stock options	3,051,000	1,152,000
Excess tax benefits from stock-based compensation	3,106,000	925,000
Cash used to net share settle equity awards	(913,000)	(806,000)
Proceeds from issuance of common stock	0	71,760,000
Stock issuance costs	0	(4,787,000)
Net cash (used in) provided by financing activities	(50,642,000)	51,896,000
Effect of exchange rate changes on cash and cash equivalents	(143,000)	(75,000)
Net (decrease) increase in cash and cash equivalents	(47,529,000)	52,119,000
Cash and cash equivalents - Beginning of period	61,230,000	24,599,000
Cash and cash equivalents - End of period	13,701,000	76,718,000
Cash paid during the period for:
Interest, net	7,405,000	8,642,000
Income taxes, net of refunds	3,684,000	3,981,000
Non-cash investing and financing activities:
Property acquired under capital lease	1,591,000	6,000
Contingent consideration	$ 1,320,000	$ 0