Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Mar. 31, 2020
Current assets:
Cash and cash equivalents	$ 92,608	$ 46,653
Accounts receivable, net of allowance for expected credit losses of $1,334 and for doubtful accounts of $1,634, respectively	30,940	35,869
Contract assets	2,744	2,125
Inventories	1,322	3,887
Prepaid expenses and other current assets	4,338	4,874
Total current assets	131,952	93,408
Property and equipment, net	9,519	12,230
Operating lease right-of-use assets	12,600	13,829
Goodwill	19,622	19,622
Intangible assets, net	8,400	8,400
Deferred income taxes, non-current	1,234	764
Other non-current assets	5,874	6,309
Total assets	189,201	154,562
Current liabilities:
Accounts payable	5,435	13,403
Contract liabilities	39,360	42,244
Accrued liabilities	8,853	9,033
Operating lease liabilities, current	4,755	4,719
Finance lease obligations, current	22	24
Total current liabilities	58,425	69,423
Deferred income taxes, non-current	894	880
Operating lease liabilities, non-current	9,353	10,617
Finance lease obligations, non-current	10	25
Other non-current liabilities	3,740	1,860
Commitments and contingencies (see Note 8)
Shareholders' equity:
Common shares, without par value, at $0.30 stated value; 80,000,000 shares authorized; 31,606,831 shares issued; and 23,637,552 and 23,609,398 shares outstanding at December 31, 2020 and March 31, 2020, respectively	9,482	9,482
Treasury shares, 7,969,279 and 7,997,433 at December 31, 2020 and March 31, 2020, respectively	(2,391)	(2,401)
Capital in excess of stated value	14,584	5,491
Retained earnings	60,116	58,984
Accumulated other comprehensive (loss) income	(12)	201
Total shareholders' equity	81,779	71,757
Total liabilities and shareholders' equity	189,201	$ 154,562
Series A Convertible Preferred Stock [Member]
Liabilities Noncurrent:
Series A convertible preferred stock, no par value	$ 35,000