Note 1 - Organization, Nature of Business and Summary of Significant Accounting Policies - Securities Excluded From Computation of Basic and Diluted Earnings Per Share (Details) - shares	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Basic earnings per share:
Unvested restricted stock (in shares)	537
Potentially dilutive securities excluded as anti-dilutive (in shares)	759,000
Employee Stock Option [Member]
Basic earnings per share:
Potentially dilutive securities excluded as anti-dilutive (in shares)	235,000
Warrant [Member]
Basic earnings per share:
Potentially dilutive securities excluded as anti-dilutive (in shares)
Restricted Stock [Member]
Basic earnings per share:
Potentially dilutive securities excluded as anti-dilutive (in shares)	524
Predecessor [Member]
Basic earnings per share:
Unvested restricted stock (in shares)		1,529	2,610
Potentially dilutive securities excluded as anti-dilutive (in shares)		6,298,000	5,786,000
Predecessor [Member] | Employee Stock Option [Member]
Basic earnings per share:
Potentially dilutive securities excluded as anti-dilutive (in shares)		4,808,000	3,661,000
Predecessor [Member] | Warrant [Member]
Basic earnings per share:
Potentially dilutive securities excluded as anti-dilutive (in shares)
Predecessor [Member] | Restricted Stock [Member]
Basic earnings per share:
Potentially dilutive securities excluded as anti-dilutive (in shares)		1,490	2,125