COMMITMENTS AND CONTINGENCIES - Commitments (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jul. 31, 2017 USD ($)	Jul. 31, 2016 USD ($)	Jul. 31, 2017 USD ($)	Jul. 31, 2016 USD ($)	Jan. 31, 2017 USD ($)	Dec. 14, 2016 ft²
Operating lease commitments
2018	$ 256,000		$ 256,000
Total	256,000		256,000
Purchase commitments
2018	264,000		264,000
2019	263,000		263,000
2020	263,000		263,000
2021	263,000		263,000
Total	1,053,000		1,053,000
Contractual obligation commitments
2018	520,000		520,000
2019	263,000		263,000
2020	263,000		263,000
2021	263,000		263,000
Total	1,309,000		1,309,000
Rent expense
Leased office and laboratory area | ft²						12,066
Rent expense	$ 154,000	$ 86,000	$ 299,000	$ 172,000
Excess inventory charge					$ 343,000