Significant Accounting Policies - Earnings Per Share (Details) - USD ($)	12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018
Significant Accounting Policies
Net earnings (loss)	$ (5,865,000)	$ (3,099,000)
Weighted average shares outstanding - Basic (in shares)	19,540,980	19,090,899
Weighted average shares outstanding - Diluted (in shares)	19,540,980	19,090,899
Basic net earnings (loss) per common stock (in dollars per share)	$ (0.30)	$ (0.16)
Diluted net earnings (loss) per common stock (in dollars per share)	$ (0.30)	$ (0.16)