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, 2020	Jan. 31, 2019	Jan. 31, 2018
Assets:
Net operating loss carryforwards	$ 22,683	$ 8,228
Stock awards	2,367	2,188
Research and development credit carryforwards	134	631
Purchased intangibles	415	604
Accrued expenses and other	994	758
Total Assets	26,593	12,409
Liabilities:
Purchased intangibles	(3,317)	(3,373)
Construction contracts	(1,618)	(454)
Property and equipment	(1,983)	(1,986)
Other	(193)	(145)
Total Liabilities	(7,111)	(5,958)
Valuation Allowances	(11,588)	(5,194)
Deferred tax assets	7,894	1,257
Net operating losses	9,500
NOL which may be carried forward indefinitely	38,500
Income tax benefit	$ 7,053	$ 4,651	$ (40,279)
Utilization of operating loss carry forward	80.00%