CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Statement [Abstract]
Revenues	$ 101,739	$ 120,248
Cost of revenues	39,406	44,114
Gross profit	62,333	76,134
Operating expenses:
Research and development	4,920	9,248
Sales and marketing	41,158	50,962
General and administrative	23,220	26,339
Amortization of intangible assets	688	934
Restructuring expenses	2,206	2,292
Impairment of intangible assets		1,736
Gain on sale of assets	(856)
Total operating expenses	71,336	91,511
Operating loss	(9,003)	(15,377)
Other income (expense):
Interest expense, net	(7,482)	(5,365)
Gain (loss) on change of fair value of warrants	12,044	(687)
Loss on debt extinguishment		(9,478)
Other expenses, net	(133)	(28)
Total other income (expense)	4,429	(15,558)
Loss from continuing operations before taxes	(4,574)	(30,935)
Income tax benefit	(34)	(4,634)
Loss from continuing operations	(4,540)	(26,301)
Income (loss) from discontinued operations, net of applicable taxes	2,246	(3,624)
Net loss	$ (2,294)	$ (29,925)
(Loss) income per share, basic:
Continuing operations	$ (0.36)	$ (3.06)
Discontinued operations	0.18	(0.42)
Net loss per share, basic	(0.18)	(3.49)
(Loss) income per share, diluted:
Continuing operations	(1.25)	(3.06)
Discontinued operations	0.17	(0.42)
Net loss per share, diluted	$ (1.08)	$ (3.49)
Shares used in calculating basic net loss per share	12,788	8,582
Shares used in calculating diluted net loss per share	13,282	8,582