Stockholders's Equity - Warrants (Details)		12 Months Ended
	Dec. 07, 2017 USD ($) shares	Feb. 03, 2018 USD ($) item tranche shares	Aug. 17, 2017 USD ($) shares	Jan. 28, 2017 shares
Warrants
Warrants issued to purchase shares of common stock | shares	511,111	977,806	326,695	120,000
Initial term	7 years
Fair value of stock warrants	$ 600,000		$ 700,000
Hi-Tec License | Warrants
Warrants
Warrants issued to purchase shares of common stock | shares		120,000
Number of tranches of warrants | tranche		5
Number of shares vest in each tranches | shares		20,000
Initial term		5 years
Renewal period		5 years
Value of warrants until the related contingency is resolved		$ 0
Tranches | item		5
Fair value of stock warrants		$ 600,000
Contra revenue and additional paid-in capital recognized		60,000
Total unrecognized expenses related to first five tranches of stock warrant		$ 500,000
Expenses recognized over remaining life		4 years