INCOME TAXES - Schedule of Tax Effects of Temporary Differences that Gave Rise to Deferred Tax Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021	Jan. 31, 2020
Assets:
Net operating loss carryforwards	$ 14,360	$ 14,192
Stock awards	2,325	2,549
Research and development credit carryforwards	269	102
Purchased intangibles	19	234
Lease liabilities	772	775
Accrued expenses and other	1,828	1,422
Total Assets	19,573	19,274
Liabilities:
Purchased intangibles	(3,533)	(3,513)
Construction contracts	(1,034)	(968)
Property and equipment	(1,334)	(1,801)
Right-of-use assets	(768)	(770)
Other	(43)	(176)
Total Liabilities	(6,712)	(7,228)
Valuation allowances	(12,404)	(11,797)
Deferred tax assets	457	249
Net operating losses	5,900
Income tax (expense) benefit	$ (11,356)	$ (1,074)	$ 7,053