Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2020
Cash flows from operating activities
Net income (loss)	$ (7,080)	$ 10,134	$ (5,610)
Less: Net income (loss) from discontinued operations	(180)	9,643	(3,852)
Net income (loss) from continuing operations	(6,900)	491	(1,758)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Project Loss	3,394
Right-of-use asset non-cash expense	2,515	1,438	1,199
Deferred income taxes	(485)	607	105
Depreciation of property and equipment	820	734	770
Stock-based compensation	3,401	2,902	2,495
Amortization of intangible assets	3,240	2,036	1,255
Loss on disposal of equipment	177	0	0
Other	0	86	(60)
Changes in operating assets and liabilities, net of effects of discontinued operations and acquisitions:
Trade accounts receivable	(6,608)	(227)	235
Unbilled accounts receivable and deferred revenue	148	903	(2,353)
Inventories	(2,914)	(1,085)	(124)
Prepaid expenses and other assets	(2,495)	(1,738)	(951)
Trade accounts payable and accrued expenses	2,683	4,168	(409)
Operating lease liabilities	(2,569)	(1,427)	(866)
Net cash provided by (used in) operating activities - continuing operations	(5,593)	8,888	(462)
Net cash used in operating activities - discontinued operations	(128)	(2,398)	(3,365)
Net cash provided by (used in) in operating activities	(5,721)	6,490	(3,827)
Cash flows from investing activities
Purchases of property and equipment	(466)	(601)	(409)
Purchase of short-term investments	0	(23,655)	(33,786)
Maturities of investments	3,100	32,025	24,225
Capitalized software development costs	(1,635)	(767)	(633)
Cash paid in business acquisition, net of cash acquired	0	(15,000)	(5,581)
Net cash provided by (used in) investing activities - continuing operations	999	(7,998)	(16,184)
Net cash provided by (used in) investing activities - discontinued operations	1,500	9,740	(59)
Net cash provided by (used in) investing activities	2,499	1,742	(16,243)
Cash flows from financing activities
Proceeds from stock option exercises	1,330	2,633	256
Proceeds from ESPP purchases	436	448	370
Tax withholding payments for net share settlements of restricted stock units	(203)	(208)	(15)
Proceeds from issuance of common stock, net of costs	0	0	26,751
Net cash provided by financing activities - continuing operations	1,563	2,873	27,362
Net cash provided by financing activities - discontinued operations	0	0	0
Net cash provided by financing activities	1,563	2,873	27,362
Increase (decrease) in cash, cash equivalents and restricted cash	(1,659)	11,105	7,292
Cash, cash equivalents and restricted cash at beginning of period	25,468	14,363	7,071
Cash, cash equivalents and restricted cash at end of period	23,809	25,468	14,363
Supplemental cash flow information:
Income taxes	223	183	63
Supplemental schedule of non-cash investing and financing activities:
Issuance of common stock for vested restricted stock units	15	15	7
Lease liabilities arising from obtaining right-of-use assets	2,544	689	581
Deferred purchase price receivable	0	1,500	0
Issuance of common stock in connection with acquisition	0	0	4,535
Deferred consideration related to TrafficCast acquisition	0	2,050	0
Working capital adjustment related to TrafficCast acquisition	$ 0	$ 681	$ 0