CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Revenue:
Product revenue	$ 13,970,367us-gaap_SalesRevenueGoodsNet	$ 4,963,059us-gaap_SalesRevenueGoodsNet
Support and services revenue	5,969,509us-gaap_SalesRevenueServicesNet	7,038,440us-gaap_SalesRevenueServicesNet
Total revenue	19,939,876us-gaap_SalesRevenueNet	12,001,499us-gaap_SalesRevenueNet
Cost of revenue:
Product	390,224us-gaap_CostOfGoodsSold	575,124us-gaap_CostOfGoodsSold
Support and service	2,020,018us-gaap_CostOfServices	2,099,251us-gaap_CostOfServices
Total cost of revenue	2,410,242us-gaap_CostOfRevenue	2,674,375us-gaap_CostOfRevenue
Gross profit	17,529,634us-gaap_GrossProfit	9,327,124us-gaap_GrossProfit
Operating expenses:
Research and development costs	3,205,867us-gaap_ResearchAndDevelopmentExpense	3,348,795us-gaap_ResearchAndDevelopmentExpense
Selling and marketing	5,305,362us-gaap_SellingAndMarketingExpense	5,888,466us-gaap_SellingAndMarketingExpense
General and administrative	2,492,941us-gaap_GeneralAndAdministrativeExpense	2,391,410us-gaap_GeneralAndAdministrativeExpense
Investigation, litigation, and settlement related costs	17,028falc_InvestigationCosts	111,711falc_InvestigationCosts
Restructuring costs	134,476us-gaap_RestructuringCharges	223,573us-gaap_RestructuringCharges
Total operating expenses	11,155,674us-gaap_OperatingExpenses	11,963,955us-gaap_OperatingExpenses
Operating income (loss)	6,373,960us-gaap_OperatingIncomeLoss	(2,636,831)us-gaap_OperatingIncomeLoss
Interest and other (loss) income, net	(464,076)us-gaap_OtherNonoperatingIncomeExpense	50,108us-gaap_OtherNonoperatingIncomeExpense
Income (loss) before income taxes	5,909,884	(2,586,723)
Provision for income taxes	647,505us-gaap_IncomeTaxExpenseBenefit	215,075us-gaap_IncomeTaxExpenseBenefit
Net income (loss)	5,262,379us-gaap_NetIncomeLoss	(2,801,798)us-gaap_NetIncomeLoss
Less: Accrual of Series A redeemable convertible preferred stock dividends	190,786	186,904
Less: Accretion to redemption value of Series A redeemable convertible preferred stock	137,417	115,376
Net income (loss) attributable to common stockholders	$ 4,934,176	$ (3,104,078)
Basic net income (loss) per share attributable to common stockholders (in dollars per share)	$ 0.12us-gaap_EarningsPerShareBasic	$ (0.06)us-gaap_EarningsPerShareBasic
Diluted net income (loss) per share attributable to common stockholders (in dollars per share)	$ 0.10us-gaap_EarningsPerShareDiluted	$ (0.06)us-gaap_EarningsPerShareDiluted
Weighted average basic shares outstanding (in shares)	40,935,380	48,031,737
Weighted average diluted shares outstanding (in shares)	51,264,247	48,031,737

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