Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Net income	$ 1,713	$ 1,232
Adjustments to reconcile net income to net cash provided by operating activities:
Loss on disposal of property and equipment		29
Depreciation and amortization	767	998
Non-cash reserve accretion	212	218
Stock based compensation	327	195
Provision for losses on accounts receivable	14	6
Deferred taxes-net	1,124	764
Changes in assets and liabilities:
Decrease in accounts receivable and other receivables	7,041	1,310
Increase in inventories	(4,758)	(543)
Decrease (increase) in other assets	298	(277)
Increase in accounts payable	1,400	717
(Decrease) increase in accrued compensation	(779)	202
Increase in accrued income taxes	40	86
Decrease in other liabilities	(1,048)	(396)
Net cash provided by operating activities	6,351	4,541
Cash flows from investing activities:
Capital expenditures	(540)	(386)
Capitalized Qualification units	(937)	(174)
Net cash (used in) investing activities	(1,477)	(560)
Cash flows from financing activities:
Payments on long-term debt	(821)	(2,465)
Net borrowings (repayments) of other debt	0	0
Exercise of stock options	194
Net cash (used in) financing activities	(627)	(2,465)
Increase in cash	4,247	1,516
Cash at beginning of period	6,381	3,371
Cash at end of period	10,628	4,887
Supplemental information:
Interest payments	203	325
Income tax payments	78	42
Non-cash financing activity for stock option exercise	$ 82