CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Cash flows from operating activities:
Net income	$ 2,826	$ 2,920
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Write-off of engineering project development qualification units	571	111
Billed qualification costs	747
Depreciation and amortization	1,129	1,113
Non-cash reserve accretion	256	299
Stock based compensation	517	609
Provision for losses on accounts receivable	13	13
Deferred taxes-net	90	1,851
Changes in assets and liabilities:
(Increase) decrease in accounts receivable and other receivables	251	9,386
(Increase) decrease in inventories	(6,134)	(5,697)
(Increase) decrease in other assets	(178)	(848)
Increase (decrease) in accounts payable	784	(282)
Increase (decrease) in accrued compensation	(1,356)	306
Increase (decrease) in accrued income taxes	662	(129)
Increase (decrease) in other liabilities	(2,010)	(429)
Net cash (used in) provided by operating activities	(1,832)	9,223
Cash flows from investing activities:
Capital expenditures	(742)	(265)
Capitalized qualification units and pre-qualification assets	(1,349)	(1,170)
Net cash used in investing activities	(2,091)	(1,435)
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	677	41
Net cash provided by (used in) financing activities	644	(10,638)
Decrease in cash	(3,279)	(2,850)
Cash at beginning of period	6,688	12,683
Cash at end of period	3,409	9,833
Supplemental information:
Interest payments	33	83
Income tax payments	980	460
Non-cash financing activity for stock option exercise		$ 122