Basic and Diluted Net IncomePer Share Earnings (Loss) Per Share Calculation (Details) (USD $) Share data in Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2014		Sep. 30, 2014		Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net income (loss)	$ (4,467,000)	[1]	$ (4,469,000)	[1]	$ (8,211,000)	[1]	$ (10,434,000)	[1]	$ (26,015,000)	[1]	$ (12,720,000)	[1]	$ (4,112,000)	[1]	$ (6,557,000)	[1]	$ (27,581,000)	$ (49,404,000)	$ (43,474,000)	[2]
Interest on convertible notes, net of tax benefit																	0	0	0
Net loss, diluted																	$ (27,581,000)	$ (49,404,000)	$ (43,474,000)
Weighted average shares used to calculate net loss per share, basic																	34,699	28,805	27,174	[2]
Effect of escrow shares (in shares)																	0	0	0
Effect of convertible notes (in shares)																	0	0	0
Weighted average shares used to calculate net income (loss) per share, diluted																	34,699	28,805	27,174	[2]
Basic (in dollars per share)	$ (0.12)		$ (0.12)		$ (0.23)		$ (0.35)		$ (0.89)		$ (0.44)		$ (0.14)		$ (0.23)		$ (0.79)	$ (1.72)	$ (1.60)	[2]
Diluted (in dollars per share)	$ (0.12)		$ (0.12)		$ (0.23)		$ (0.35)		$ (0.89)		$ (0.44)		$ (0.14)		$ (0.23)		$ (0.79)	$ (1.72)	$ (1.60)	[2]
Total equity award shares excluded																	3,209	3,993	3,082
Restricted Stock Units (RSUs) [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Effect of dilutive equity awards (in shares)																	0	0	0
Stock Options [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Effect of dilutive equity awards (in shares)																	0	0	0
Contingent Consideration Classified as Equity [Member]
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Total equity award shares excluded																	0	0	700

[1] The comparability of our income (loss) from operations and net income (loss) per share was affected by the following unusual income or expense items:•During the fourth quarter of 2013, the Company recorded a $12.5 million loss associated with the establishment of a valuation allowance against certain of the Company's foreign deferred tax assets.•During the first quarter of 2013, the Company recorded a $2.9 million loss associated to the write off of the Company's Security Gateway ("SEG") purchased computer software due to management's decision to abandon future development of this technology.•During the first quarter of 2013, the Company recorded a $1.5 million gain associated with the the sale of the Company's OS-9 software assets.

[2] {F|ahBzfndlYmZpbGluZ3MtaHJkcmoLEgZYTUxEb2MiXlhCUkxEb2NHZW5JbmZvOmUxNDNhNTIzNTkwMTQyYjA4YWUxZjgzODc5NWFkZjE2fFRleHRTZWxlY3Rpb246NzYwNUQ2QzBENzk5MDZDNEQyQ0FGQUQ1M0RGN0IyNDkM}