Significant Accounting Policies - Calculation of Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Jul. 31, 2021	Jan. 31, 2021	Jul. 31, 2020	Jan. 31, 2020
Basic and diluted net (loss) income per share computation
Net income (loss) attributable to common stockholders	$ (172)	$ (172)	$ 75	$ 75
Weighted Average common shares - basic (in shares)	13,401,929		12,727,275
Basic net income per share (in dollars per share)	$ (0.01)		$ 0.01
Net income (loss) available to common stockholders	$ (172)		$ 75
Incremental shares from assumed exercise of warrants and stock options (in shares)	0		1,504,366
Adjusted weighted average share - diluted (in shares)	13,401,929		14,231,641
Diluted net income per share (in dollars per share)	$ (0.01)		$ 0.01