Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

Subsequent Events (Details) $ / shares in Units, $ in Millions					3 Months Ended	6 Months Ended	27 Months Ended
	Oct. 27, 2017 USD ($) $ / shares	Oct. 18, 2017 USD ($)	Oct. 13, 2017 USD ($) payment	Sep. 13, 2017 USD ($)	Sep. 30, 2017 USD ($) $ / shares	Sep. 30, 2017 USD ($) $ / shares	Sep. 30, 2017 USD ($) $ / shares	Oct. 26, 2017 $ / shares shares	Aug. 31, 2017 $ / shares	Mar. 31, 2017 $ / shares	Oct. 18, 2016 $ / shares	Apr. 19, 2016 $ / shares shares
Subsequent Event Items
Net proceeds from equity issuances					$ 1.4	$ 4.0	$ 16.8
Common stock, par value (in dollars per share) \| $ / shares					$ 0.001	$ 0.001	$ 0.001			$ 0.001
Subsequent event
Subsequent Event Items
Common stock, par value (in dollars per share) \| $ / shares	$ 0.001
Reduction of warrants to purchase common stock (as a percent)	19.00%
Turbine International, LLC. and MTE Service \| Subsequent event
Subsequent Event Items
Proceeds from sale of distribution rights		$ 6.3
Turbine International, LLC. and MTE Service \| Accounts Receivable Agreement
Subsequent Event Items
Proceeds from sale of receivables				$ 0.1
Turbine International, LLC. and MTE Service \| Accounts Receivable Agreement \| Subsequent event
Subsequent Event Items
Total consideration receivable			$ 2.5
Number of payments to be received \| payment			3
Turbine International, LLC. and MTE Service \| Promissory Note Agreement \| Subsequent event
Subsequent Event Items
Total consideration receivable			$ 3.8
Number of payments to be received \| payment			35
Term of payments			3 years
Series A Warrants
Subsequent Event Items
Number of shares of common stock that could be purchased with warrants \| shares												4,100,000
Exercise price (in dollars per share) \| $ / shares									$ 0.65		$ 1.34	$ 3.50
Series A Warrants \| Subsequent event
Subsequent Event Items
Number of shares of common stock that could be purchased with warrants \| shares								1,928,750
Exercise price (in dollars per share) \| $ / shares								$ 0.90
Net proceeds from equity issuances	$ 1.7