CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS UNAUDITED (Parenthetical) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Non-cash activity:
Accrued restricted stock award dividends	$ 5	$ 15
Reduction of deferred tax asset for excess of recorded RSA tax benefit over actual tax benefit	$ 0
4.5% Convertible Notes [Member]
Financing activities
Debt instrument, interest rate	4.50%	4.50%
AC 4% PIK Note [Member]
Financing activities
Debt instrument, interest rate	4.00%
AC 1.6% Note [Member]
Financing activities
Debt instrument, interest rate	1.60%