COMMITMENTS AND CONTINGENCIES - Commitments (Details)	12 Months Ended
	Jan. 31, 2017 USD ($)	Jan. 31, 2016 USD ($)	Dec. 14, 2016 ft²
Operating lease commitments
2018	$ 564,000
Total	564,000
Purchase commitments
2018	264,000
2019	263,000
2020	263,000
2021	263,000
Total	1,053,000
Contractual obligation commitments
2018	828,000
2019	263,000
2020	263,000
2021	263,000
Total	1,617,000
Rent expense
Leased office and laboratory area | ft²			12,066
Rent expense	434,000	$ 357,000
Excess inventory charge	$ 343,000