Consolidated Statements of Operations and Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net sales:
Products	$ 241,609	$ 159,220	$ 101,360
Services	132,501	101,786	95,010
Total net sales	374,110	261,006	196,370
Cost of sales:
Products (exclusive of depreciation and amortization shown below)	155,516	113,399	66,154
Services (exclusive of depreciation and amortization shown below)	73,111	57,233	63,054
Depreciation and amortization	9,662	8,647	7,666
Total cost of sales	238,289	179,279	136,874
Gross Profit	135,821	81,727	59,496
Operating expenses:
Selling, general and administrative (exclusive of depreciation and amortization shown below)	61,116	42,650	29,418
Depreciation and amortization	6,304	4,605	3,929
Restructuring charges	681
Total operating expenses	68,101	47,255	33,347
Income from operations	67,720	34,472	26,149
Other income (expense):
Interest, net	(18,328)	(7,508)	(7,838)
Foreign currency gain (loss)	59	(124)	(142)
Loss on debt modification and early extinguishment	(703)	(476)
Other income (expense), net	359	(101)	18
Total other expense	(18,613)	(8,209)	(7,962)
Income before income taxes	49,107	26,263	18,187
Provision for income taxes	(17,846)	(10,291)	(6,988)
Net income from continuing operations	31,261	15,972	11,199
Discontinued operations:
Loss from a discontinued operation, net of taxes (Note 4)	(606)	(2,670)	(2,612)
Gain on sale of a discontinued operation, net of taxes	208
Net Income	30,863	13,302	8,587
Preferred stock dividends	(32,548)	(44,477)	(35,268)
Net income (loss) attributable to common stockholders	$ (1,685)	$ (31,175)	$ (26,681)
Basic and diluted loss per share:
Continuing operations	$ (0.03)	$ (0.69)	$ (0.59)
Discontinued operation	(0.01)	(0.07)	(0.06)
Total basic and diluted loss per share	$ (0.04)	$ (0.76)	$ (0.65)
Comprehensive Income
Net income	$ 30,863	$ 13,302	$ 8,587
Currency translation adjustment	(1,715)	(1,064)	(261)
Total comprehensive income	$ 29,148	$ 12,238	$ 8,326