Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2022	Mar. 31, 2022
Current assets:
Cash and cash equivalents	$ 94,897	$ 96,971
Accounts receivable, net of allowance for expected credit losses of $496 and $318, respectively	22,901	25,175
Contract assets	2,661	1,669
Inventories	7,246	6,940
Prepaid expenses and other current assets	4,435	5,418
Total current assets	132,140	136,173
Property and equipment, net	5,896	6,345
Operating lease right-of-use assets	9,277	9,889
Goodwill	32,759	32,759
Intangible assets, net	19,831	20,178
Deferred income taxes, non-current	2,677	2,664
Other non-current assets	6,179	6,154
Total assets	208,759	214,162
Current liabilities:
Accounts payable	8,185	9,766
Contract liabilities	41,989	46,095
Accrued liabilities	7,870	10,552
Operating lease liabilities, current	4,729	5,049
Finance lease obligations, current	4	4
Total current liabilities	62,777	71,466
Deferred income taxes, non-current	943	938
Operating lease liabilities, non-current	4,970	5,649
Finance lease obligations, non-current	1	2
Other non-current liabilities	3,792	3,304
Commitments and contingencies (see Note 11)
Shareholders' equity:
Common shares, without par value, at $0.30 stated value; 80,000,000 shares authorized; 31,606,831 shares issued; and 25,025,983 and 24,728,532 shares outstanding at June 30,2022 and March 31, 2022, respectively	9,482	9,482
Treasury shares, 6,580,848 and 6,878,299 at June 30,2022 and March 31, 2022, respectively	(1,974)	(2,063)
Capital in excess of stated value	51,624	49,963
Retained earnings	42,598	40,018
Accumulated other comprehensive loss	(454)	(56)
Total shareholders' equity	101,276	97,344
Total liabilities and shareholders' equity	208,759	214,162
Series A Convertible Preferred Stock [Member]
Liabilities Noncurrent:
Series A convertible preferred stock, no par value	$ 35,000	$ 35,459