Note 3 - Correction of Immaterial Errors - Reconciliation of the Effects of the Adjustments (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2020	Jan. 31, 2019	Jan. 31, 2018
Other long-term liabilities	$ 575	$ 1,347
Total long-term liabilities	23,757	13,416
Retained Earnings (Accumulated Deficit), Ending Balance	(715)	(4,291)	$ (3,741)
Total stockholders' equity	55,629	51,701	51,174
Cost of Sales	98,617	105,647
Gross profit	29,046	23,318
Income from operations	5,940	2,722
Income from operations before income taxes	5,035	1,600
Net loss	3,576	(550)
Comprehensive loss	2,696	(1,964)
Other assets and liabilities	(143)	529
Accumulated deficit	$ (715)	(4,291)	(3,741)
Stockholders' equity - revised			51,174
Previously Reported [Member]
Other long-term liabilities		688
Total long-term liabilities		12,757
Retained Earnings (Accumulated Deficit), Ending Balance		(3,632)	(3,103)
Total stockholders' equity		52,360	51,812
Cost of Sales		105,626
Gross profit		23,339
Income from operations		2,743
Income from operations before income taxes		1,621
Net loss		(529)
Comprehensive loss		(1,943)
Other assets and liabilities		508
Accumulated deficit		(3,632)	(3,103)
Revision of Prior Period, Adjustment [Member]
Other long-term liabilities		659
Total long-term liabilities		659
Retained Earnings (Accumulated Deficit), Ending Balance		(659)	(638)
Total stockholders' equity		(659)	(638)
Cost of Sales		21
Gross profit		(21)
Income from operations		(21)
Income from operations before income taxes		(21)
Net loss		(21)
Comprehensive loss		(21)
Other assets and liabilities		21
Accumulated deficit		$ (659)	$ (638)