Capitalization - Warrants (Details)		3 Months Ended	9 Months Ended
	Aug. 17, 2017 USD ($) shares	Oct. 28, 2017 USD ($)	Oct. 28, 2017 USD ($) tranche shares	Jan. 28, 2017 USD ($) shares
Warrants
Warrants			$ 704,000
Warrants | Hi-Tec License
Warrants
Warrants issued to purchase shares of common stock | shares	326,695			120,000
Number of tranches of warrants | tranche			5
Number of shares vest in each tranches | shares			20,000
Initial term	7 years		5 years
Renewal period			5 years
Value of warrants until the related contingency is resolved		$ 0	$ 0
Fair value of stock warrants	$ 665			$ 567,000
Warrants	$ 665	$ 13,000	$ 39,000