Condensed Consolidated Balance Sheets - USD ($)	Sep. 30, 2023	Mar. 31, 2023
Current assets:
Cash and cash equivalents	$ 107,413,000	$ 112,842,000
Accounts receivable, net of allowance for expected credit lossesof $723 and $610, respectively	27,762,000	22,378,000
Contract assets	3,278,000	2,242,000
Inventories	7,485,000	9,774,000
Prepaid expenses and other current assets	7,473,000	7,422,000
Total current assets	153,411,000	154,658,000
Property and equipment, net	17,477,000	14,576,000
Operating lease right-of-use assets	23,097,000	12,708,000
Goodwill	32,755,000	32,638,000
Intangible assets, net	17,505,000	18,140,000
Deferred income taxes, non-current	3,153,000	2,790,000
Other non-current assets	7,816,000	7,526,000
Total assets	255,214,000	243,036,000
Accrued liabilities:
Accounts payable	10,069,000	9,418,000
Contract liabilities	43,334,000	52,124,000
Accrued liabilities	13,764,000	13,708,000
Operating lease liabilities, current	5,540,000	3,263,000
Finance lease obligations, current	0	2,000
Total current liabilities	72,707,000	78,515,000
Deferred income taxes, non-current	2,278,000	2,257,000
Operating lease liabilities, non-current	23,294,000	13,477,000
Other non-current liabilities	4,858,000	4,018,000
Commitments and contingencies
Shareholders' equity:
Common shares, without par value, at $0.30 stated value; 80,000,000 shares authorized; 31,606,831 shares issued; and 25,370,482 and 25,326,626 shares outstanding at September 30, 2023 and March 31, 2023, respectively	9,482,000	9,482,000
Treasury shares, 6,236,349 and 6,280,205 at September 30, 2023 and March 31, 2023, respectively	(1,871,000)	(1,884,000)
Capital in excess of stated value	55,154,000	52,978,000
Retained earnings	57,939,000	52,764,000
Accumulated other comprehensive loss	(4,086,000)	(4,030,000)
Total shareholders' equity	116,618,000	109,310,000
Total liabilities and shareholders' equity	255,214,000	243,036,000
Series A Convertible Preferred Stock [Member]
Other non-current liabilities:
Series A convertible preferred stock, no par value	$ 35,459,000	$ 35,459,000