Income Taxes (Details) (USD $)	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
Operating Loss Carryforwards [Line Items]
Unrecognized Tax Benefits	$ 3,688,000								$ 3,446,000								$ 3,688,000	$ 3,446,000	$ 3,011,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	3,200,000																3,200,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense																	200,000
Uncertain Tax Benefits, Potential Change, Current																	500,000
Deferred Tax Assets, Valuation Allowance	84,240,000								76,873,000								84,240,000	76,873,000
Deferred Tax Assets, Tax Credit Carryforwards, Research	17,100,000																17,100,000
Investment Tax Credit																	4,700,000
Deferred Tax Liabilities, Undistributed Foreign Earnings	200,000																200,000
Undistributed Earnings of Foreign Subsidiaries	500,000																500,000
Indefinite Reinvestment of Undistributed Earnings from Foreign Subsidiaries																	20,800,000
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest	(4,304,000)	[1]	(4,103,000)	[1]	(7,429,000)	[1]	(9,464,000)	[1]	(13,947,000)	[1]	(11,996,000)	[1]	(3,273,000)	[1]	(5,550,000)	[1]	(25,089,000)	(34,449,000)	(40,884,000)	[2]
Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	170,600,000								89,500,000								170,600,000	89,500,000
Foreign Tax Authority [Member]
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	4,500,000																4,500,000
Maximum
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards, Expiration Year																	2034
CANADA
Operating Loss Carryforwards [Line Items]
Deferred Tax Assets, Valuation Allowance	12,500,000																12,500,000
Deferred Tax Assets, Tax Credit Carryforwards, Research	15,900,000																15,900,000
Domestic [Member]
Operating Loss Carryforwards [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest																	29,900,000	47,200,000	55,800,000
Foreign Countries [Member]
Operating Loss Carryforwards [Line Items]
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest																	4,800,000	12,800,000	14,900,000
Interest Expense [Member]
Operating Loss Carryforwards [Line Items]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	600,000																600,000
Penalty [Domain]
Operating Loss Carryforwards [Line Items]
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 300,000																$ 300,000

[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.

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