COMMITMENTS AND CONTINGENCIES - Commitments (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 31, 2017 USD ($)	Oct. 31, 2016 USD ($)	Oct. 31, 2017 USD ($)	Oct. 31, 2016 USD ($)	Jan. 31, 2017 USD ($)	Sep. 30, 2017 ft²	Dec. 14, 2016 ft²
Operating lease commitments
2018	$ 159,000		$ 159,000
2019	534,000		534,000
Total	693,000		693,000
Purchase commitments
2018	263,000		263,000
2019	269,000		269,000
2020	269,000		269,000
2021	269,000		269,000
Total	1,070,000		1,070,000
Contractual obligation commitments
2018	422,000		422,000
2019	803,000		803,000
2020	269,000		269,000
2021	269,000		269,000
Total	1,763,000		1,763,000
Rent expense
Leased office and laboratory area | ft²						12,203	12,066
Rent expense	$ 154,000	$ 86,000	$ 453,000	$ 259,000
Excess inventory charge					$ 343,000