Note 9 - Equity and Stock-based Compensation - Stock-based Compensation Expense (Details) - USD ($)	1 Months Ended	2 Months Ended	3 Months Ended	4 Months Ended	6 Months Ended
	May 04, 2016	Jun. 30, 2016	Jun. 30, 2017	May 04, 2016	Jun. 30, 2017
Share-based compensation			$ 12,163		$ 27,971
Predecessor [Member]
Share-based compensation	$ 15,550			$ 55,081
Selling and Marketing Expense [Member]
Share-based compensation			1,392		2,514
Selling and Marketing Expense [Member] | Predecessor [Member]
Share-based compensation	4,959			18,504
Research and Development Expense [Member]
Share-based compensation			3,112		6,223
Research and Development Expense [Member] | Predecessor [Member]
Share-based compensation	1,914			6,858
General and Administrative Expense [Member]
Share-based compensation			$ 7,659		$ 19,234
General and Administrative Expense [Member] | Predecessor [Member]
Share-based compensation	$ 8,677			$ 29,719