Equity Transactions and Stock-Based Compensation Plans (Tables)

3 Months Ended

Mar. 31, 2016

Share-based Compensation Arrangement by Share-based Payment Award [Line Items]

Schedule of Compensation Cost for Share-based Payment Arrangements, Allocation of Share-based Compensation Costs by Plan

The following table summarizes the stock-based compensation expense recognized for stock option, restricted stock and restricted stock unit awards, and the compensation expense recognized for phantom stock unit awards during thethree months ended March 31, 2016 and 2015 (amounts in thousands):

	Three months ended March 31,
	2016		2015
Stock option awards	$	193	$	264
Restricted stock awards	87		124
Restricted stock unit awards	897		17
	$	1,177	$	405
Phantom stock unit awards	$	118	$	—

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions

The following table summarizes the assumptions used in the Black-Scholes option pricing model based on a weighted-average calculation for thethree months ended March 31, 2016 and 2015:

	Three months ended March 31,
	2016			2015
Expected volatility	70		%	64		%
Risk-free interest rates	1.5		%	1.4		%
Expected life in years	5.70			5.52
Options granted	905,966			341,638
Grant-date fair value	$	0.80		$	2.31

Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]

The following table summarizes the number and weighted-average grant-date fair value of the restricted stock unit awards granted during the three months ended March 31, 2016 and 2015:

	Three months ended March 31,
	2016		2015
Time-based RSUs:
Time-based RSUs granted	231,834		151,919
Weighted-average grant-date fair value	$	1.31	$	4.08
Performance-based RSUs:
Performance-based RSUs granted	—		294,666
Weighted-average grant-date fair value	$	—	$	4.49