Note 6 - Net Income (Loss) Per Common Share - Schedule of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Net income (loss) applicable to common stock		$ 448	$ (5,324)
Weighted average shares of common stock outstanding (in shares)		12,151	11,218
Net income (loss) per common share - basic (in dollars per share)		$ 0.04	$ (0.47)
Common shares issuable upon conversion of the Convertible Second Lien Notes associated warrants (in shares)		150
Common shares issuable upon conversion of warrants of unsecured claim holders (in shares)		1,418
Common shares issuable on assumed conversion of restricted stock ** (in shares)	[1]	413
Diluted weighted average shares of common stock outstanding (in shares)		14,132	11,218
Net income (loss) per common share - diluted (in dollars per share)		$ 0.03	$ (0.47)
Share-based Payment Arrangement [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	[1]	0	201
Convertible Debt Securities [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)		1,875	1,875
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)			1,916

[1] Common shares issuable on assumed conversion of share-based compensation assumes a payout of the Company's performance share awards at 100% of the initial units granted (or a ratio of one unit to one common share). The range of common stock shares which may be earned ranges from zero to 250% of the initial performance units granted.