Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Sep. 30, 2011	Mar. 31, 2011
Assets
Cash and cash equivalents	$ 15,559	$ 11,560
Short-term investments	1,014	1,011
Accounts receivable, net of allowances of $436 and $485	21,637	27,618
Inventories, net	32,844	29,507
Deferred tax assets	1,268	947
Prepaid expenses and other current assets	4,052	2,499
Total current assets	76,374	73,142
Property and equipment, net	30,233	30,017
Patents and licenses, net	1,677	1,620
Long-term accounts receivable	7,948	6,030
Deferred tax assets	2,358	2,112
Other long-term assets	1,984	2,069
Total assets	120,574	114,990
Liabilities and Shareholders' Equity
Accounts payable	10,384	12,479
Accrued expenses and other	2,683	2,324
Deferred revenue, current	3,077	262
Current maturities of long-term debt	2,351	1,137
Total current liabilities	18,495	16,202
Long-term debt, less current maturities	6,930	4,225
Deferred revenue, long-term	1,583	1,777
Other long-term liabilities	400	399
Total liabilities	27,408	22,603
Commitments and contingencies (See Note F)
Shareholders' equity:
Preferred stock, $0.01 par value: Shares authorized: 30,000,000 shares at March 31, 2011 and September 30, 2011; no shares issued and outstanding at March 31, 2011 and September 30, 2011
Common stock, no par value: Shares authorized: 200,000,000 at March 31, 2011 and September 30, 2011; shares issued: 30,312,758 and 30,403,067 at March 31, 2011 and September 30, 2011; shares outstanding: 22,893,803 and 23,010,653 at March 31, 2011 and September 30, 2011
Additional paid-in capital	126,002	124,805
Shareholder notes receivable	(244)	(193)
Treasury stock: 7,418,955 and 7,392,414 common shares at March 31, 2011 and September 30, 2011	(31,757)	(31,708)
Accumulated deficit	(835)	(517)
Total shareholders' equity	93,166	92,387
Total liabilities and shareholders' equity	$ 120,574	$ 114,990