CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net income	$ 1,156	$ 1,211
Adjustments to reconcile net income to net cash used in operating activities:
Write-off of engineering project development qualification units		111
Billed qualification costs	743
Depreciation and amortization	749	746
Non-cash reserve accretion	174	201
Stock based compensation	350	464
Provision for losses on accounts receivable	9	9
Deferred taxes-net	561	731
Changes in assets and liabilities:
(Increase) decrease in accounts receivable and other receivables	3,318	371
(Increase) decrease in inventories	(6,958)	(3,541)
(Increase) decrease in other assets	(365)	(687)
Increase (decrease) in accounts payable	1,425	598
Increase (decrease) in accrued compensation	(1,335)	(602)
Increase (decrease) in accrued income taxes	(741)	100
Increase (decrease) in other liabilities	(1,660)	(344)
Net cash used in operating activities	(2,574)	(632)
Cash flows from investing activities:
Capital expenditures	(447)	(132)
Capitalized qualification units and pre-qualification assets	(744)	(1,056)
Net cash used in investing activities	(1,191)	(1,188)
Cash flows from financing activities:
Payments on long-term debt		(10,679)
Net borrowings (repayments) of other debt
Payment of debt issue costs	(33)
Exercise of stock options	607	1
Net cash provided by (used in) financing activities	574	(10,678)
Increase (decrease) in cash	(3,191)	(12,498)
Cash at beginning of period	6,688	12,683
Cash at end of period	3,497	185
Supplemental information:
Interest payments	26	74
Income tax payments	980	45
Non-cash financing activity for stock option exercise		$ 122