Consolidated Statements of Operations and Comprehensive Loss - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jul. 31, 2021	Jul. 31, 2020	Jul. 31, 2021	Jul. 31, 2020
Revenue:
Total revenue	$ 6,540	$ 4,995	$ 11,592	$ 11,910
Cost of revenue:
Total cost of revenue	2,423	3,181	4,644	7,587
Gross profit	4,117	1,814	6,948	4,323
Operating expenses:
Research and development	2,213	3,360	4,881	7,526
Selling and marketing	1,643	1,728	3,023	3,854
General and administrative	2,682	2,367	4,787	4,421
Severance and restructuring costs	87	543	571	1,029
Total operating expenses	6,625	7,998	13,262	16,830
Loss from operations	(2,508)	(6,184)	(6,314)	(12,507)
Other income (expense), net	212	373	(16)	165
Gain on extinguishment of debt	2,440		2,440
Income (loss) before income taxes	144	(5,811)	(3,890)	(12,342)
Income tax benefit	83	45	49	66
Net income (loss)	$ 227	$ (5,766)	$ (3,841)	$ (12,276)
Net income (loss) per share, basic	$ 0.00	$ (0.15)	$ (0.09)	$ (0.33)
Net income (loss) per share, diluted	$ 0.00	$ (0.15)	$ (0.09)	$ (0.33)
Weighted average common shares outstanding, basic	48,489	37,527	44,958	37,376
Weighted average common shares outstanding, diluted	48,727	37,527	44,958	37,376
Comprehensive loss:
Net income (loss)	$ 227	$ (5,766)	$ (3,841)	$ (12,276)
Other comprehensive (loss) income, net of tax:
Comprehensive loss	(172)	(4,114)	(4,198)	(10,639)
Foreign currency translation adjustment	(399)	1,665	(358)	1,641
Unrealized (losses) gains on marketable securities		(13)	1	(4)
Total other comprehensive (loss) income	(399)	1,652	(357)	1,637
Product [Member]
Revenue:
Total revenue	2,709	1,066	4,329	4,164
Cost of revenue:
Cost of revenue	693	788	1,099	2,368
Service [Member]
Revenue:
Total revenue	3,831	3,929	7,263	7,746
Cost of revenue:
Cost of revenue	$ 1,730	$ 2,393	$ 3,545	$ 5,219