COMMITMENTS AND CONTINGENCIES - Commitments (Details)	12 Months Ended
	Jan. 31, 2018 USD ($)	Jan. 31, 2017 USD ($)	Sep. 30, 2017 ft²	Dec. 14, 2016 ft²
Operating lease commitments
2019	$ 534,000
Total	534,000
Purchase commitments
2019	323,000
2020	269,000
2021	269,000
Total	861,000
Contractual obligation commitments
2019	857,000
2020	269,000
2021	269,000
Total	1,395,000
Rent expense
Leased office and laboratory area | ft²			12,203	12,066
Rent expense	612,000	$ 434,000
Excess inventory charge	$ 215,000