Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 3,706	$ 8,161
Adjustments to reconcile net income to net cash used for operating activities:
Depreciation and amortization	4,270	4,102
Accretion of investment discount	(194)	(160)
Provision for accounts receivable allowances	2,553	1,530
Deferred tax provision	799	745
Share-based compensation expense	688	867
Gain on bargain purchase	(376)	0
Loss on sale of assets	43	0
Changes in assets and liabilities:
Accounts receivable	(48,987)	(54,558)
Inventory	(19,815)	(13,774)
Other assets	(48)	(293)
Accounts payable	13,652	13,942
Other accrued liabilities	1,683	2,077
Total adjustments	(45,732)	(45,522)
Net cash used for operating activities	(42,026)	(37,361)
Cash flows from investing activities:
Maturities of investment securities	60,000	70,000
Purchase of held-to-maturity investment securities	0	(24,924)
Purchase of a business	(1,125)	0
Purchase of property, plant and equipment	(2,831)	(2,817)
Purchase of intangibles	(100)	0
Proceeds from sale of fixed assets	311	23
Net cash provided by investing activities	56,255	42,282
Cash flows from financing activities:
Dividends paid	(3,634)	(3,321)
Purchase of treasury stock	0	(10,000)
Exercise of stock options, net of tax withholdings	(32)	0
Payments for tax withholding on net restricted stock settlements	(527)	(518)
Tax effect on stock awards	278	234
Net cash used for financing activities	(3,915)	(13,605)
Net increase (decrease) in cash and cash equivalents	10,314	(8,684)
Cash and cash equivalents at beginning of period	19,927	36,429
Cash and cash equivalents at end of period	$ 30,241	$ 27,745