Zix (ZIXI) 10-K 12 Mar 14 2013 FY Annual report Financial data

Document_and_Entity_Informatio

Document and Entity Information (USD $)	12 Months Ended
	Dec. 31, 2013	Mar. 07, 2014	Jun. 30, 2013
Document And Entity Information [Abstract]	'	'	'
Document Type	'10-K	'	'
Amendment Flag	'false	'	'
Document Period End Date	31-Dec-13	'	'
Document Fiscal Year Focus	'2013	'	'
Document Fiscal Period Focus	'FY	'	'
Trading Symbol	'ZIXI	'	'
Entity Registrant Name	'ZIX CORP	'	'
Entity Central Index Key	'0000855612	'	'
Current Fiscal Year End Date	'--12-31	'	'
Entity Well-known Seasoned Issuer	'No	'	'
Entity Current Reporting Status	'Yes	'	'
Entity Voluntary Filers	'No	'	'
Entity Filer Category	'Accelerated Filer	'	'
Entity Common Stock, Shares Outstanding	'	59,606,164	'
Entity Public Float	'	'	$257,542,205

CONSOLIDATED_BALANCE_SHEETS

CONSOLIDATED BALANCE SHEETS (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$27,518	$22,988
Receivables, net	2,324	967
Prepaid and other current assets	2,038	1,697
Deferred tax assets	1,814	1,600
Total current assets	33,694	27,252
Property and equipment, net	2,608	2,384
Goodwill	2,161	2,161
Deferred tax assets	52,239	51,052
Total assets	90,702	82,849
Current liabilities:	'	'
Accounts payable	495	501
Accrued expenses	1,992	2,655
Deferred revenue	19,080	17,470
Total current liabilities	21,567	20,626
Long-term liabilities:	'	'
Deferred revenue	1,278	902
Deferred rent	1,623	76
Total long-term liabilities	2,901	978
Total liabilities	24,468	21,604
Commitments and contingencies (Note 13)	'	'
Stockholders' equity:	'	'
Preferred stock, $1 par value, 10,000,000 shares authorized; none issued and outstanding	'	'
Common stock, $0.01 par value, 175,000,000 shares authorized; 74,417,946 issued and 60,513,287 outstanding in 2013 and 73,165,433 issued and 61,264,533 outstanding in 2012	737	728
Additional paid-in capital	359,154	355,747
Treasury stock, at cost; 13,904,659 common shares in 2013 and 11,900,900 common shares in 2012	-50,386	-41,506
Accumulated deficit	-243,271	-253,724
Total stockholders' equity	66,234	61,245
Total liabilities and stockholders' equity	$90,702	$82,849

CONSOLIDATED_BALANCE_SHEETS_Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Statement Of Financial Position [Abstract]	'	'
Preferred stock, par value	$1	$1
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	'	'
Preferred stock, shares outstanding	'	'
Common stock, par value	$0.01	$0.01
Common stock, shares authorized	175,000,000	175,000,000
Common stock, shares issued	74,417,946	73,165,433
Common stock, shares outstanding	60,513,287	61,264,533
Treasury stock, shares	13,904,659	11,900,900

CONSOLIDATED_STATEMENTS_OF_INC

CONSOLIDATED STATEMENTS OF INCOME (USD $)	12 Months Ended
In Thousands, except Share data, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]	'	'	'
Revenues	$48,138	$43,356	$38,145
Cost of revenues	7,614	7,609	7,211
Gross margin	40,524	35,747	30,934
Research and development expenses	9,563	7,419	5,229
Selling, general and administrative expenses	21,646	19,385	15,128
Operating income	9,315	8,943	10,577
Other income (expense):	'	'	'
Investment and other income	132	112	95
Interest expense	'	-1	-7
Total other income	132	111	88
Income before income taxes	9,447	9,054	10,665
Income tax benefit	1,006	1,949	11,889
Net income	$10,453	$11,003	$22,554
Basic income per common share	$0.17	$0.18	$0.34
Diluted income per common share	$0.17	$0.17	$0.34
Weighted average shares outstanding	'	'	'
Basic common shares outstanding	61,139,035	62,211,228	65,439,078
Diluted common shares outstanding	62,526,507	62,875,347	67,261,514

CONSOLIDATED_STATEMENTS_OF_STO

CONSOLIDATED STATEMENTS OF STOCKHOLDERS EQUITY (USD $)	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Deficit [Member]
In Thousands, except Share data
Beginning balance at Dec. 31, 2010	$46,887	$695	$344,981	($11,507)	($287,282)
Beginning balance, shares at Dec. 31, 2010	'	69,505,919	'	'	'
Issuance of common stock upon exercise of stock options	1,791	7	1,784	'	'
Issuance of common stock upon exercise of stock options, shares	725,936	725,936	'	'	'
Issuance of common stock upon exercise of warrants	3,707	24	3,683	'	'
Issuance of common stock upon exercise of warrants, shares	'	2,407,610	'	'	'
Employee stock-based compensation costs	569	'	569	'	'
Non-employee stock-based compensation	48	'	48	'	'
Stock option exercise excess tax benefit	3,200	'	3,200	'	'
Treasury repurchase program	-20,999	'	'	-20,999	'
Net income	22,554	'	'	'	22,554
Ending balance at Dec. 31, 2011	57,757	726	354,265	-32,506	-264,728
Ending balance, shares at Dec. 31, 2011	'	72,639,465	'	'	'
Issuance of common stock upon exercise of stock options	308	2	306	'	'
Issuance of common stock upon exercise of stock options, shares	174,968	174,968	'	'	'
Issuance of restricted common stock, shares	'	351,000	'	'	'
Employee stock-based compensation costs	1,166	'	1,166	'	'
Non-employee stock-based compensation	10	'	10	'	'
Treasury repurchase program	-9,000	'	'	-9,000	'
Net income	11,003	'	'	'	11,003
Ending balance at Dec. 31, 2012	61,245	728	355,747	-41,506	-253,724
Ending balance, shares at Dec. 31, 2012	'	73,165,433	'	'	'
Issuance of common stock upon exercise of stock options	1,705	9	1,696	'	'
Issuance of common stock upon exercise of stock options, shares	839,263	839,263	'	'	'
Issuance of common stock upon vesting of restricted stock units	'	28,250	'	'	'
Issuance of restricted common stock, shares	'	385,000	'	'	'
Employee stock-based compensation costs	1,591	'	1,711	-120	'
Treasury repurchase program	-8,760	'	'	-8,760	'
Net income	10,453	'	'	'	10,453
Ending balance at Dec. 31, 2013	$66,234	$737	$359,154	($50,386)	($243,271)
Ending balance, shares at Dec. 31, 2013	'	74,417,946	'	'	'

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating activities:	'	'	'
Net income	$10,453	$11,003	$22,554
Non-cash items in net income:	'	'	'
Depreciation and amortization	1,466	1,343	1,373
Employee stock-based compensation expense	1,711	1,166	569
Non-employee stock-based compensation	'	10	48
Changes in deferred taxes	-1,401	-2,295	-11,796
Changes in operating assets and liabilities:	'	'	'
Receivables	-1,357	-263	640
Prepaid and other assets	-341	-275	-264
Accounts payable	-103	140	-87
Deferred revenue	1,986	1,009	593
Accrued and other liabilities	884	695	-411
Net cash provided by operating activities	13,298	12,533	13,219
Investing activities:	'	'	'
Purchases of property and equipment	-1,593	-1,533	-1,471
Net cash used in investing activities	-1,593	-1,533	-1,471
Financing activities:	'	'	'
Proceeds from exercise of stock options	1,705	308	1,791
Proceeds from exercise of warrants	'	'	3,707
Payment of license subscription note payable	'	'	-186
Treasury stock	-8,880	-9,000	-20,999
Net cash used in financing activities	-7,175	-8,692	-15,687
Increase (decrease) in cash and cash equivalents	4,530	2,308	-3,939
Cash and cash equivalents, beginning of year	22,988	20,680	24,619
Cash and cash equivalents, end of year	$27,518	$22,988	$20,680

Company_Overview

Company Overview	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Company Overview	'
	1. Company Overview
	Zix Corporation (“ZixCorp,” the “Company,” “we,” “our,” “us”) provides email encryption, data loss prevention (“DLP”) and Bring-Your-Own-Device (“BYOD”) solutions to meet the data protection and compliance needs of organizations primarily in the healthcare, financial services, insurance and government sectors.

Summary_of_Significant_Account

Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Summary of Significant Accounting Policies	'
	2. Summary of Significant Accounting Policies
	Basis of Presentation — The accompanying consolidated financial statements include the accounts of all our wholly-owned subsidiaries and are prepared in accordance with accounting principles generally accepted in the United States of America. All inter-company accounts and transactions have been eliminated in consolidation.
	Use of Estimates — The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported period. Our significant estimates include primarily those required in the valuation or impairment analysis of goodwill and property and equipment, revenue recognition, allowances for doubtful accounts, stock-based compensation, litigation accruals, valuation allowances for deferred tax assets and tax accruals. Although we believe that adequate accruals have been made for unsettled issues, additional gains or losses could occur in future years from resolutions of outstanding matters. Actual results could differ materially from original estimates.
	Cash Equivalents — Cash investments with maturities of three months or less when purchased are considered cash equivalents.
	Fair Value of Financial Instruments —The Company does not measure the fair value of any financial instrument other than cash equivalents, options, restricted stock, restricted stock units, and warrants. The carrying values of other financial instruments (receivables and accounts payable) are not recorded at fair value but approximate fair values primarily due to their short-term nature. The carrying values of other current assets and accrued expenses are also not recorded at fair value, but approximate fair values primarily due to their short-term nature.
	Valuation of Property and Equipment — The accounting policies and estimates relating to property and equipment are considered significant because of the potential impact that impairment, obsolescence, or change in an asset’s useful life could have on the Company’s operating results.
	We record an impairment charge on the assets to be held and used when we determine based upon certain triggering events that the carrying value of property and equipment may not be recoverable based on expected undiscounted cash flows attributable to such assets. The amount of a potential impairment is determined by comparing the carrying amount of the asset to either the value determined from a projected discounted cash flow method, using a discount rate that is considered to be commensurate with the risk inherent in the Company’s current business model or the estimated fair market value. Assumptions are made with respect to future net cash flows expected to be generated by the related asset. An impairment charge would be recorded for an amount by which the carrying value of the asset exceeded the discounted projected net cash flows or estimated fair market value. Also, even where a current impairment charge is not necessary, the remaining useful lives are evaluated. No impairment was recorded for any of the periods presented.
	Property and equipment are recorded at cost and depreciated or amortized using the straight-line method over their estimated useful lives as follows: computer and office equipment and software — three years; leasehold improvements — the shorter of five years or the lease term; and furniture and fixtures — five years.
	Goodwill — We account for the valuation of goodwill and other intangible assets after classifying intangible assets into three categories: (1) intangible assets with finite lives subject to amortization; (2) intangible assets with indefinite lives not subject to amortization; and (3) goodwill. For intangible assets with finite lives, tests for impairment must be performed if conditions exist that indicate the carrying value may not be recoverable. For intangible assets with indefinite lives and goodwill, tests for impairment must be performed at least annually or more frequently if events or circumstances indicate that assets might be impaired.
	Goodwill was $2.2 million, or 2% and 3% of total assets for the years ended December 31, 2013 and 2012, respectively.
	Our goodwill is not being amortized, but we do evaluate the goodwill for impairment annually in the fourth quarter, or when there is reason to believe that the value has been diminished or impaired. Evaluations for possible impairment are based upon a comparison of the estimated fair value of the reporting unit to which the goodwill has been assigned, versus the sum of the carrying value of the assets and liabilities of that unit including the assigned goodwill value. The fair values used in this evaluation are estimated based on the Company’s market capitalization, which is based on the outstanding stock and market price of the stock. Impairment is deemed to exist if the net book value of the unit exceeds its estimated fair value. No impairment was recorded for any of the periods presented.
	Deferred Tax Assets — Deferred tax assets are recognized if it is “more likely than not” that the benefit of the deferred tax asset will be realized on future federal or state income tax returns. At December 31, 2013, we provided a valuation allowance against a significant portion, $46.2 million, of our accumulated U.S. deferred tax assets, reflecting our historical losses and the uncertainty of future taxable income sufficient to utilize net operating loss carryforwards prior to their expiration. Our total deferred tax asset not subject to a valuation allowance is valued at $54.1 million, and consists of $45.3 million for federal net operating loss carryforwards, $5.7 million relating to temporary timing differences between GAAP and tax-related expense, $2.0 million relating to U.S. state income tax credits and $1.1 million related to Alternative Minimum Tax credits. If U.S. taxable income increases from its current level in a future period or if the facts and circumstances on which our estimates and assumptions are based were to change, thereby impacting the likelihood of realizing the deferred tax assets, judgment would have to be applied in determining the amount of valuation allowance no longer required. Reversal of all or a part of this valuation allowance could have a significant positive impact on operating results in the period that it becomes more likely than not that certain of the Company’s deferred tax assets will be realized. Alternatively, should our future income decrease from current levels, a resulting increase to all or a part of this valuation allowance could also have a significant negative impact on our operating results.
	Leases — A leased asset whose lease terms meet the criteria for capitalization is recorded as an asset and depreciated. If a lease does not meet the criteria for capitalization, it is classified as an operating lease and payments are recorded as rent expense. For 2013 and 2012 we had no leases that qualified as capital leases. Lease renewal options which we are “reasonably assured” of using and the related payments are taken into account when initially classifying and recording the lease as a capital lease obligation or as straight-line rent if an operating lease. Funds provided by the lessor for leasehold improvements are recorded as a deferred lease incentive and amortized as a reduction of rent expense over the lease term.
	Revenue Recognition — We develop, market, and support applications that connect, protect and deliver information in a secure manner. Our services can be placed into several key revenue categories where each category has similar revenue recognition traits: Email Encryption, DLP, and BYOD email subscription-based services, various transaction fees and related professional services. The majority of the revenues generated are through a combination of direct sales and a network of resellers and other distribution partners.
	Under all product categories and distribution models, we recognize revenue after all of the following occur:
		•	persuasive evidence of an arrangement exists,
		•	delivery has occurred or services have been rendered,
		•	the price is fixed and determinable, and
		•	collectability is reasonably assured.
	Discounts provided to customers are recorded as reductions in revenue.
	Our Email Encryption, DLP and BYOD services are subscription services. Providing these services includes delivering subscribed-for software and providing secure electronic communications and customer support throughout the subscription period. Our subscribers generally execute multiple-year contracts that are irrevocable and non-refundable in nature and require annual, up-front payments. Subscription fees received from customers are initially recorded as deferred revenue and then recognized as revenue ratably over the subscription period. We do not offer stand alone services. Further, our services primarily include manufacturer provided warranty provisions. We recorded no warranty expense in any of the presented periods.
	Software Development Costs — Costs incurred in the development and testing of software used in the Company’s Email Encryption, DLP, and BYOD email services related to research, project planning, training, maintenance and general and administrative activities, and overhead costs are expensed as incurred. The costs of relatively minor upgrades and enhancements to the software are also expensed as incurred.
	Costs for the development of new software solutions and substantial enhancements to existing software solutions are expensed as incurred until technological feasibility has been established, at which time any additional costs would be capitalized. No research and development costs have been capitalized because we believe that technological feasibility is established concurrent with general release to customers.
	Advertising Expense — Advertising costs are expensed as incurred. Our continuing operations include advertising expense of $959 thousand, $538 thousand, and $544 thousand in 2013, 2012, and 2011, respectively.
	Stock-Based Compensation — We currently use the straight-line amortization method for recognizing stock option and restricted stock compensation costs. The measurement and recognition of compensation expense for all share-based payment awards made to our employees, directors or outside service providers are based on the estimated fair value of the awards on the grant dates. The grant date fair value is estimated using either an option-pricing model which is consistent with the terms of the award or a market observed price, if such a price exists. Such cost is recognized over the period during which an employee, director or outside service provider is required to provide service in exchange for the award, i.e., “the requisite service period” (which is usually the vesting period). We also estimate the number of instruments that will ultimately be earned, rather than accounting for forfeitures as they occur.
	Earnings Per Share (“EPS”) — Basic EPS is based on the weighted average number of common shares outstanding during each period. Diluted EPS adjusts Basic EPS for the effects of dilutive common stock equivalents outstanding during each period using the treasury stock method.
	New Accounting Standards
	Presentation of Other Comprehensive Income
	In February 2013, the FASB issued guidance that requires entities to provide information about the amounts reclassified out of accumulated other comprehensive income by component and to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective items of net income. This new guidance did not have an impact on our consolidated financial statements.
	Unrecognized Tax Benefit
	In July 2013, the FASB issued guidance that requires entities to present unrecognized tax benefits (UTB) in the financial statements as a reduction to a deferred tax asset (DTA) for a net operating loss (NOL) carryforward when NOL’s exist. Entities whose NOL carryforwards are not available to settle taxes that would result from the disallowance of the tax position, or who do not intend to use their DTA for that purpose, should present their UTB as a liability and should not net the UTB with the DTA. The guidance becomes effective for us fiscal year 2014. We do not anticipate that this new guidance will have an impact on our consolidated financial statements.

Stock_Options_and_Stockbased_E

Stock Options and Stock-based Employee Compensation	12 Months Ended
	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Stock Options and Stock-based Employee Compensation	'
	3. Stock Options and Stock-based Employee Compensation
	Below is a summary of common stock options outstanding at December 31, 2013:
		Authorized			Options			Options			Available
		Shares			Outstanding			Vested			for
											Grant
	Employee and Director Stock Option Plans:
	1995 Long-term Incentive Plan		1,825,000			680,000			680,000			—
	1999 Director’s Stock Option Plan		975,000			83,292			83,292			—
	2001 Stock Option Plan		2,525,000			515,796			515,796			—
	2001 Employee Stock Option Plan		300,000			77,931			77,931			—
	2003 New Employee Stock Option Plan		500,000			16,400			14,399			—
	2004 Stock Option Plan		5,000,000			3,254,404			2,937,718			—
	2004 Director’s Stock Option Plan		300,000			160,000			160,000			—
	2006 Director’s Stock Option Plan		1,100,000			586,676			586,676			—
	2012 Incentive Plan		2,700,000			723,875			202,686			523,160
	Total employee and director stock option plans		15,225,000			6,098,374			5,258,498			523,160
	Executive Stock Option Agreements:
	Richard D. Spurr, Chairman, President and CEO		650,000			650,000			650,000			—
	Total		15,875,000			6,748,374			5,908,498			523,160
	Under all of our stock option plans, new shares are issued when options are exercised.
	Employee and Director Stock Option Plans
	We have non-qualified stock options outstanding to employees and directors under various stock option plans. The plans require the exercise price of options granted under these plans to equal or exceed the fair market value of the Company’s common stock on the date of grant. The options, subject to termination of employment, generally expire ten years from the date of grant. Historically, our employee options typically vested pro-rata and quarterly over three years. Option grants to employees, officers and directors frequently contain accelerated vesting provisions upon the occurrence of a change of control, as defined in the applicable option agreements.
	Under the terms of the 2012 Incentive Plan adopted by the Company’s Board of Directors on April 13, 2012 (the “2012 Plan”), 2,700,000 shares are available for issuance, plus a number of additional shares (not to exceed 1,327,000) underlying options outstanding under certain of the Company’s prior equity plans that thereafter terminate or expire unexercised, or are cancelled, forfeited, or lapse for any reason. Awards issued under the 2012 Plan typically vest pro-rata and quarterly over four years.
	Executive Stock Option Agreements:
	Richard D. Spurr — In January 2004, Mr. Richard D. Spurr was appointed president and chief operating officer of the Company. Mr. Spurr received non-shareholder approved options to acquire 650,000 shares of ZixCorp common stock at an exercise price of $10.80 per share. At December 31, 2013, all 650,000 options were vested and outstanding. These options expired unexercised in February 2014. Mr. Spurr was appointed Chief Executive Officer in March 2005, and Chairman of the Board in February 2006.
	Other Stock Option Agreements:
	From time to time we may grant stock options to consultants, contractors and other third parties for services provided to the Company. These options are expensed based on their fair values as calculated by using the Black-Scholes Option Pricing Model (“BSOPM”). At December 31, 2013, options outstanding to non-employees were 55,000, which were granted from our stock option plans.
	Accounting Treatment
	We use the straight-line amortization method for recognizing stock option compensation costs. Our share-based awards include stock options, restricted stock and restricted stock units (“RSU’s”).
	For the twelve months ended December 31, 2013, 2012, and 2011, respectively, the total stock-based compensation expense resulting from stock options, restricted stock, and RSU’s was recorded to the following line items of our consolidated statement of income:
		Year Ended December 31,
	(In thousands)	2013			2012			2011
	Cost of revenues	$	172		$	136		$	71
	Research and development expenses		212			142			68
	Selling, general and administrative expenses		1,327			888			430
	Stock-based compensation expense	$	1,711		$	1,166		$	569
	As of December 31, 2013, there was $3.2 million of total unrecognized stock-based compensation related to non-vested share-based compensation awards granted under the stock option plans. This cost is expected to be recognized over a weighted average period of 1.6 years.
	We used the BSOPM to determine the fair value of option grants made during 2013, 2012, and 2011. On January 1, 2006, we elected to use the “simplified” method to calculate the estimated life of options granted to employees. The use of the “simplified” method has been extended until such time when we have sufficient information to make more refined estimates on the estimated life of our options. The expected stock price volatility was calculated by averaging the historical volatility of the Company’s common stock over a term equal to the expected life of the options.
	The following weighted average assumptions were applied in determining the fair value of options granted during the respective periods:
		Year Ended December 31,
		2013			2012			2011
	Risk-free interest rate		1.05	%		0.92	%		1.81	%
	Expected option life (years)		5.8			6			5.8
	Expected stock price volatility		69	%		74	%		75	%
	Expected dividend yield		—			—			—
	Fair value of options granted	$	1.99		$	1.72		$	2.48
	The assumptions used in the BSOPM valuation are critical as a change in any given factor could have a material impact on the financial results of the Company. The weighted average grant-date fair value of awards of restricted stock and RSU’s is based on quoted market price of the Company’s common stock on the date of grant.
	Stock Option Activity
	There were 839,263 stock options exercised for the twelve months ended December 31, 2013. As a result of these stock option exercises, there was $427 thousand in excess tax benefits recorded in 2013. For the comparative period in 2012, there were 174,968 stock option exercises. A deferred tax asset totaling $321 thousand and $306 thousand resulting from stock-based compensation expenses was recorded for the twelve months ended December 31, 2013 and 2012, respectively.
	The following is a summary of all stock option transactions for the three years ended December 31, 2013:
		Shares			Weighted			Weighted
					Average			Average
					Exercise			Remaining
					Price			Contractual
								Term (Yrs)
	Outstanding at January 1, 2011		7,646,892		$	4.42
	Granted at market price		536,500		$	3.83
	Cancelled or expired		(310,006	)	$	6.41
	Exercised		(725,936	)	$	2.46
	Outstanding at December 31, 2011		7,147,450		$	4.48
	Granted at market price		1,099,000		$	2.69
	Cancelled or expired		(386,706	)	$	4.69
	Exercised		(174,968	)	$	1.76
Outstanding at December 31, 2012		7,684,776		$	4.28
Granted at market price		150,000		$	3.27
Cancelled or expired		(247,139	)	$	5.15
Exercised		(839,263	)	$	2.03
Outstanding at December 31, 2013		6,748,374		$	4.5			3.67
Options exercisable at December 31, 2013		5,908,498		$	4.73			3.1
At December 31, 2013, we had 4,110,030 options outstanding and 3,270,154 options exercisable in which the exercise price was lower than the market value of the Company’s common stock. The aggregate intrinsic value of these options was $6.6 million and $5.2 million, respectively. At December 31, 2012, we had 2,267,052 options outstanding and 1,657,907 options exercisable in which the exercise price was lower than the market value of the Company’s common stock. The aggregate intrinsic value of these options was $2.0 million and $1.8 million, respectively.
The total intrinsic value of options exercised during the years ended December 31, 2013 and 2012, was $1.9 million and $135 thousand, respectively.
Summarized information about stock options outstanding at December 31, 2013, is as follows:
	Options Outstanding									Options Exercisable
Range of	Number			Weighted			Weighted			Number		Weighted
Exercise Prices	Outstanding			Average			Average			Exercisable		Average
				Remaining			Exercise					Exercise
				Contractual Life			Price					Price
$1.11 - $1.99		711,697			3.01		$	1.52			711,697	$	1.52
$2.00 - $3.49		1,923,433			6.61		$	2.72			1,198,070	$	2.71
$3.50 - $4.99		2,578,652			3.59		$	4.34			2,464,139	$	4.36
$5.00 - $5.99		286,500			0.77		$	5			286,500	$	5
$6.00 - $8.99		455,300			0.76		$	6.45			455,300	$	6.45
$9.00 - $11.00		792,792			0.14		$	10.72			792,792	$	10.72
		6,748,374			3.67		$	4.5			5,908,498	$	4.73
There were 6,412,505 and 7,034,356 exercisable options at December 31, 2012 and 2011, respectively.
Restricted Stock Activity
The following is a summary of all restricted stock activity during the two years ended December 31, 2013:
	Restricted			Weighted
	Shares			Average
				Fair Value
Outstanding at January 1, 2012		—			—
Granted at market price		351,000		$	2.49
Vested		—			—
Cancelled		—			—
Unvested restricted stock at December 31, 2012		351,000		$	2.49
Granted at market price		385,000		$	3.45
Vested		(87,750	)		2.49
Cancelled		—			—
Unvested restricted stock at December 31, 2013		648,250		$	3.06
Restricted Stock Unit Activity
The following is a summary of all RSU activity during the two years ended December 31, 2013:
	Restricted			Weighted
	Stock Units			Average
				Fair Value
Non-vested at January 1, 2012		—			—
Granted at market price		113,000		$	2.49
Vested		—			—
Cancelled		—			—
Unvested restricted stock units at December 31, 2012		113,000		$	2.49
Granted at market price		95,000		$	3.45
Vested		(28,250	)		2.49
Cancelled		—			—
Unvested restricted stock units at December 31, 2013		179,750		$	3
The weighted average grant-date fair value of awards of restricted stock and RSU’s (collectively “restricted stock”) is based on the quoted market price of the Company’s common stock on the date of grant.
Reserved Common Stock
At December 31, 2013, we held no shares of common stock in reserve for potential future grants in lieu of cash compensation to employees.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	12 Months Ended
	Dec. 31, 2013
Supplemental Cash Flow Elements [Abstract]	'
Supplemental Cash Flow Information	'
	4. Supplemental Cash Flow Information
	Supplemental information relating to interest, taxes, and noncash activities:
		Year Ended December 31,
	(In thousands)	2013			2012		2011
	Cash interest paid	$	—		$	—	$	7
	Income tax payments	$	217		$	350	$	225
	Payables related to purchases of capitalized assets	$	(97	)	$	34	$	79
	Excess tax benefit on exercise of employee stock options	$	427		$	10	$	3,200

Receivables_net

Receivables, net	12 Months Ended
	Dec. 31, 2013
Receivables [Abstract]	'
Receivables, net	'
	5. Receivables, net
		December 31,
	(In thousands)	2013			2012
	Gross accounts receivables	$	8,359		$	6,721
	Allowance for returns and doubtful accounts		(46	)		(28	)
	Unpaid portion of deferred revenue		(5,989	)		(5,726	)
	Note receivable		458			458
	Allowance for note receivable		(458	)		(458	)
	Receivables, net	$	2,324		$	967
	Our gross accounts receivables include $863 thousand associated with a tenant improvement allowance received as an incentive when we renewed the lease for our Dallas headquarters in 2013.
	The allowance for doubtful accounts includes all specific accounts receivable which we believe are likely not collectable based on known information. In addition, we record 2.5% of all accounts receivable greater than 90 days past due, net of those accounts specifically reserved, as a general allowance against accounts that could potentially become uncollectible.
	The reduction for deferred revenue represents future customer service or maintenance obligations which have been billed to customers, but remain unpaid as of the respective balance sheet dates. Deferred revenue on our consolidated balance sheets represents future customer service or maintenance obligations which have been billed and collected as of the respective balance sheet dates.
	The note receivable represents the remaining outstanding balance of an original note related to the sale of a product line in 2005 in the amount of $540 thousand. This was fully reserved at the time of the sale as the note’s collectability was not assured. The note receivable is fully reserved at December 31, 2013.

Prepaid_and_other_current_asse

Prepaid and other current assets	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Prepaid and other current assets	'
	6. Prepaid and other current assets
		December 31,
	(In thousands)	2013			2012
	Prepaid insurance, maintenance, software licenses and other	$	1,489		$	1,502
	Deferred commissions		320			215
	Deferred rent		261			—
	Tax-related		(32	)		(20	)
	Prepaid and other current assets	$	2,038		$	1,697

Property_and_Equipment

Property and Equipment	12 Months Ended
	Dec. 31, 2013
Property Plant And Equipment [Abstract]	'
Property and Equipment	'
	7. Property and Equipment
		December 31,
	(In thousands)	2013			2012
	Computer and office equipment and software	$	22,550		$	23,807
	`Leasehold improvements		5,276			5,221
	Furniture and fixtures		1,520			1,504
			29,346			30,532
	Less accumulated depreciation and amortization		(26,738	)		(28,148	)
		$	2,608		$	2,384
	Our continuing operations include depreciation and amortization expense related to property and equipment of $1.5 million, $1.3 million, and $1.4 million in 2013, 2012, and 2011, respectfully.

Goodwill

Goodwill	12 Months Ended
	Dec. 31, 2013
Goodwill And Intangible Assets Disclosure [Abstract]	'
Goodwill	'
	8. Goodwill
	At December 31, 2013 and 2012, we had goodwill totaling $2.2 million. We evaluate goodwill for impairment annually in the fourth quarter, or when there is reason to believe that the value has been diminished or impaired. There were no impairment indicators to the goodwill recorded as of December 31, 2013.

Accrued_Expenses

Accrued Expenses	12 Months Ended
	Dec. 31, 2013
Payables And Accruals [Abstract]	'
Accrued Expenses	'
	9. Accrued Expenses
		December 31,
	(In thousands)	2013		2012
	Employee compensation and benefits	$	872	$	790
	Professional fees		469		842
	Taxes		350		409
	Other		301		614
	Total accrued expenses	$	1,992	$	2,655

Fair_Value_Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	10. Fair Value Measurements
	FASB guidance regarding fair value measurement establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices in active markets for identical assets or liabilities; Level 2, defined as inputs other than quoted prices for similar assets and liabilities in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs for which little or no market data exists, therefore requiring an entity to develop its own assumptions.
	For certain of the Company’s financial instruments, including cash and cash equivalents, trade receivables, and accounts payable, the fair values approximate carrying values due to the short-term maturities of these instruments. The carrying values of other current assets and accrued expenses are also not recorded at fair value, but approximate fair values primarily due to their short-term nature.

Earnings_Per_Share_and_Potenti

Earnings Per Share and Potential Dilution	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share and Potential Dilution	'
	11. Earnings Per Share and Potential Dilution
	Basic earnings per share are computed using the weighted average number of common shares outstanding for the period. The dilutive effect of potential common shares outstanding is included in diluted earnings per share. The computations for basic and diluted earnings per share for the years ended December 31, 2013, 2012, and 2011, are as follows:
		Year Ended December 31,
		2013		2012		2011
	Basic weighted average shares		61,139,035		62,211,228		65,439,078
	Effect of dilutive securities:
	Employee and director stock options		1,095,227		637,676		943,634
	Restricted Stock		225,741		20,003		—
	RSU’s		66,504		6,440		—
	Warrants		—		—		878,802
	Potential dilutive common shares		62,526,507		62,875,347		67,261,514
	For the years ended December 31, 2013, 2012, and 2011, weighted average shares related to certain stock options of 4,054,261, 5,645,239, and 4,640,713 respectively, were excluded from the calculation of diluted earnings per share because the stock options were anti-dilutive. Anti-dilutive restricted stock and RSU’s of 31,281, and 7,719, respectively, were also excluded from the calculation for the year ended December 31, 2013. Anti-dilutive warrants of 145,853 were excluded from the calculation for the year ended December 31, 2011. All warrants expired in January 2012.

Significant_Customers

Significant Customers	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Significant Customers	'
	12. Significant Customers
	In 2013, 2012, and 2011, no single customer accounted for 10% or more of our revenues. Our accounts receivable balance at December 31, 2012, included receivables from one customer comprising 12% of the net total. These receivables were paid to the Company in the first quarter 2013.

Commitments_and_Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and Contingencies	'
	13. Commitments and Contingencies
	Leases
	We lease office facilities under non-cancelable operating lease agreements. Our continuing operations include rent expense for these operating leases of $1.3 million in each of 2013, 2012, and 2011, respectively. The term of the lease of our headquarter facility in Dallas was extended to 2024.
	A summary of our fixed contractual obligations and commitments at December 31, 2013, is as follows:
	(In thousands)	2014		2015		2016		2017		2018		Thereafter		Total
	Operating leases	$	1,009	$	1,261	$	1,163	$	1,058	$	1,014	$	6,190	$	11,695
	Claims and Proceedings
	We are subject to legal proceedings, claims, and litigation against our business. While the outcome of these matters is currently not determinable and the costs and expenses of defending these matters may be significant, we currently do not expect that the ultimate costs to resolve these matters will have a material adverse effect on our consolidated financial statements.

Income_Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	14. Income Taxes
	Components of the income taxes are as follows:
	(In thousands)	2013			2012			2011
	Current:
	U.S.	$	124		$	116		$	163
	State		148			164			122
	Foreign		123			66			(378	)
	Deferred
	Federal		(1,400	)		(2,300	)		(9,800	)
	State		—			—			(2,000	)
	Foreign		(1	)		5			4
	Income tax (benefit) expense	$	(1,006	)	$	(1,949	)	$	(11,889	)
	A reconciliation of the expected U.S. tax (benefit) expense to income taxes is as follows:
	(In thousands)	2013			2012			2011
	Expected tax (benefit) expense at U.S. statutory rate	$	3,212		$	3,078		$	3,753
	Decrease in valuations allowance- Operations		(2,650	)		(2,912	)		(3,357	)
	Decrease in valuations allowance- Other		(1,400	)		(2,300	)		(9,900	)
	Nondeductible expense and nontaxable income		(370	)		21			(125	)
	State income taxes		98			108			(1,878	)
	Foreign income taxes		122			71			(374	)
	Other		(18	)		(15	)		(8	)
	Income tax (benefit) expense	$	(1,006	)	$	(1,949	)	$	(11,889	)
	Deferred income taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Components of our deferred income taxes as of December 31, 2013 and 2012 are as follows:
	(In thousands)	2013			2012
	Deferred tax assets:
	Reserves- Other	$	251		$	218
	U.S. net operating loss carryforwards		88,562			91,396
	State net operating loss carryforwards		347			487
	Tax credit carryforwards		5,619			5,374
	Stock-based compensation		2,839			2,604
	Intangible assets		978			1,421
	Depreciable assets		1,430			1,451
	Other assets		649			323
	Total deferred tax assets		100,675			103,274
	Deferred tax liabilities:
	Prepaid expenses		(418	)		(410	)
	Total deferred tax assets		100,257			102,864
	Less valuation allowance		(46,209	)		(50,216	)
	Net deferred income taxes	$	54,048		$	52,648
	The Company has partially reserved its U.S. net deferred tax assets in 2013 and 2012 due to the uncertainty of future taxable income. The Company has U.S. net operating loss carryforwards of approximately $260 million which begin to expire in 2020. The Company has state credits that net of federal tax expense total $1.9 million which can be utilized through 2027 and state net operating losses that have various expiration dates. The Company also has tax credit carryforwards of approximately $3.8 million consisting of business tax credits which begin to expire in 2014 and alternative minimum tax credits which do not expire.
	In 2010, the Company achieved positive earnings and successfully discontinued operations of its e-Prescribing segment. Based on the weight of available objective evidence, including the Company’s history of positive earnings from continuing operations and successful exit from e-Prescribing, management believed that it was more likely than not that a portion of the deferred tax asset would be realized. Accordingly, the Company reduced its valuation allowance by $4.1 million in 2013, $5.2 million in 2012, and $15 million in 2011. The benefit from the 2011 reduction was recorded in part as an $11.8 million income tax benefit and in part as a $3.2 million increase to our additional paid in capital. The segregation of the release was due to the reduction related to historical employee stock option exercises.
	We have determined that utilization of existing net operating losses against future taxable income is not limited by Section 382 of the Internal Revenue Code. Future ownership changes, however, may limit the company’s ability to fully utilize its existing net operating loss carryforwards against any future taxable income.
	The Company previously recorded a $327 thousand tax contingency liability related to tax year 2004, and that amount and the specifics therein remained unchanged except for currency translation adjustments. As of December 31, 2010, the gross amount of our unrecognized tax benefits, inclusive of the $327 thousand tax liability and $50 thousand in other uncertain positions in 2008, was approximately $461 thousand. Included in this balance were tax positions which, if recognized, would impact our effective tax rate. Because the statute of limitations expired on the returns associated with these uncertain tax positions, this contingency was reversed in 2011, resulting in the recognition of an income tax benefit and positive impact on our 2011 operating results.
	The Company or one of our subsidiaries files income tax returns in the U.S. federal jurisdiction and various states and in the Canadian federal and provincial jurisdictions. We have not taken a tax position that, if challenged, would have a material effect on the financial statements or the effective tax rate for the twelve-months ended December 31, 2013, or during the prior three years. We have determined it is not reasonably possible for the amounts of unrecognized tax benefits to significantly increase or decrease within the next twelve months. We are currently subject to a three-year statute of limitations by major tax jurisdictions.

Employee_Benefit_Plan

Employee Benefit Plan	12 Months Ended
	Dec. 31, 2013
Postemployment Benefits [Abstract]	'
Employee Benefit Plan	'
	15. Employee Benefit Plan
	401(k) Plan — We have a retirement savings plan structured under Section 401(k) of the Internal Revenue Code covering substantially all of our U.S. employees. Under the plan, contributions are voluntarily made by employees, and we may provide contributions based on the employees’ contributions. Our operating income includes $297 thousand, $221 thousand and $185 thousand, in 2013, 2012 and 2011, respectively, for net contributions from continuing operations to this plan.

ZixCorp_Repurchase_Program

ZixCorp Repurchase Program	12 Months Ended
	Dec. 31, 2013
Equity [Abstract]	'
ZixCorp Repurchase Program	'
	16. ZixCorp Repurchase Program
	On November 6, 2013, the Company’s board of directors approved a share repurchase program that enables the Company to purchase up to $15 million of its shares from time to time in the open market. The amount and timing of specific repurchases are subject to market conditions, applicable legal requirements, and other factors. The share purchases will be funded from existing cash resources and may be suspended or discontinued at any time, however, the share repurchase program will expire on June 30, 2014. The Company repurchased 1,976,900 shares at an aggregate cost of $8.8 million under this program during the year ended December 31, 2013.
	During the year ended December 31, 2012, we repurchased 3,080,966 shares valued at approximately $9 million. This completed a $15 million share repurchase program authorized by our board of directors announced November 9, 2011. During the year ended December 31, 2011, we repurchased a total of 6,492,753 shares valued at approximately $21 million as authorized by our board of directors under a $15 million share repurchase program announced on March 7, 2011, and the $15 million repurchase program announced November 2011.

Quarterly_Results_of_Operation

Quarterly Results of Operations (Unaudited)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Quarterly Results of Operations (Unaudited)	'
	17. Quarterly Results of Operations (Unaudited)
	The following is a summary of the quarterly results of operations for the years ended December 31, 2013 and 2012:
			Quarter Ended
	(In thousands except per share data)		March 31		June 30		September 30		December 31
	2013
	Revenues		$	11,764	$	11,838	$	12,225	$	12,311
	Gross margin			9,828		9,935		10,321		10,440
	Net income			567		1,871		3,175		4,840
	Basic net income per common share*			0.01		0.03		0.05		0.08
	Diluted net income per common share*			0.01		0.03		0.05		0.08
	2012
	Revenues		$	10,301	$	10,343	$	11,023	$	11,689
	Gross margin			8,446		8,531		9,136		9,634
	Net income			2,426		2,643		1,943		3,991
	Basic net income per common share*			0.04		0.04		0.03		0.07
	Diluted net income per common share*			0.04		0.04		0.03		0.06
	*	Net income per share is calculated independently for each quarter. The sum of Net income per share for each quarter may not equal the total Net income per share for the year due to rounding differences.

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2013
Accounting Policies [Abstract]	'
Basis of Presentation	'
	Basis of Presentation — The accompanying consolidated financial statements include the accounts of all our wholly-owned subsidiaries and are prepared in accordance with accounting principles generally accepted in the United States of America. All inter-company accounts and transactions have been eliminated in consolidation.
Use of Estimates	'
	Use of Estimates — The preparation of consolidated financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amount of assets and liabilities and disclosure of contingent assets and liabilities at the date of the consolidated financial statements and the reported amounts of revenue and expenses during the reported period. Our significant estimates include primarily those required in the valuation or impairment analysis of goodwill and property and equipment, revenue recognition, allowances for doubtful accounts, stock-based compensation, litigation accruals, valuation allowances for deferred tax assets and tax accruals. Although we believe that adequate accruals have been made for unsettled issues, additional gains or losses could occur in future years from resolutions of outstanding matters. Actual results could differ materially from original estimates.
Cash Equivalents	'
	Cash Equivalents — Cash investments with maturities of three months or less when purchased are considered cash equivalents.
Fair Value of Financial Instruments	'
	Fair Value of Financial Instruments —The Company does not measure the fair value of any financial instrument other than cash equivalents, options, restricted stock, restricted stock units, and warrants. The carrying values of other financial instruments (receivables and accounts payable) are not recorded at fair value but approximate fair values primarily due to their short-term nature. The carrying values of other current assets and accrued expenses are also not recorded at fair value, but approximate fair values primarily due to their short-term nature.
Valuation of Property and Equipment	'
	Valuation of Property and Equipment — The accounting policies and estimates relating to property and equipment are considered significant because of the potential impact that impairment, obsolescence, or change in an asset’s useful life could have on the Company’s operating results.
	We record an impairment charge on the assets to be held and used when we determine based upon certain triggering events that the carrying value of property and equipment may not be recoverable based on expected undiscounted cash flows attributable to such assets. The amount of a potential impairment is determined by comparing the carrying amount of the asset to either the value determined from a projected discounted cash flow method, using a discount rate that is considered to be commensurate with the risk inherent in the Company’s current business model or the estimated fair market value. Assumptions are made with respect to future net cash flows expected to be generated by the related asset. An impairment charge would be recorded for an amount by which the carrying value of the asset exceeded the discounted projected net cash flows or estimated fair market value. Also, even where a current impairment charge is not necessary, the remaining useful lives are evaluated. No impairment was recorded for any of the periods presented.
	Property and equipment are recorded at cost and depreciated or amortized using the straight-line method over their estimated useful lives as follows: computer and office equipment and software — three years; leasehold improvements — the shorter of five years or the lease term; and furniture and fixtures — five years.
Goodwill	'
	Goodwill — We account for the valuation of goodwill and other intangible assets after classifying intangible assets into three categories: (1) intangible assets with finite lives subject to amortization; (2) intangible assets with indefinite lives not subject to amortization; and (3) goodwill. For intangible assets with finite lives, tests for impairment must be performed if conditions exist that indicate the carrying value may not be recoverable. For intangible assets with indefinite lives and goodwill, tests for impairment must be performed at least annually or more frequently if events or circumstances indicate that assets might be impaired.
	Goodwill was $2.2 million, or 2% and 3% of total assets for the years ended December 31, 2013 and 2012, respectively.
	Our goodwill is not being amortized, but we do evaluate the goodwill for impairment annually in the fourth quarter, or when there is reason to believe that the value has been diminished or impaired. Evaluations for possible impairment are based upon a comparison of the estimated fair value of the reporting unit to which the goodwill has been assigned, versus the sum of the carrying value of the assets and liabilities of that unit including the assigned goodwill value. The fair values used in this evaluation are estimated based on the Company’s market capitalization, which is based on the outstanding stock and market price of the stock. Impairment is deemed to exist if the net book value of the unit exceeds its estimated fair value. No impairment was recorded for any of the periods presented.
Deferred Tax Assets	'
	Deferred Tax Assets — Deferred tax assets are recognized if it is “more likely than not” that the benefit of the deferred tax asset will be realized on future federal or state income tax returns. At December 31, 2013, we provided a valuation allowance against a significant portion, $46.2 million, of our accumulated U.S. deferred tax assets, reflecting our historical losses and the uncertainty of future taxable income sufficient to utilize net operating loss carryforwards prior to their expiration. Our total deferred tax asset not subject to a valuation allowance is valued at $54.1 million, and consists of $45.3 million for federal net operating loss carryforwards, $5.7 million relating to temporary timing differences between GAAP and tax-related expense, $2.0 million relating to U.S. state income tax credits and $1.1 million related to Alternative Minimum Tax credits. If U.S. taxable income increases from its current level in a future period or if the facts and circumstances on which our estimates and assumptions are based were to change, thereby impacting the likelihood of realizing the deferred tax assets, judgment would have to be applied in determining the amount of valuation allowance no longer required. Reversal of all or a part of this valuation allowance could have a significant positive impact on operating results in the period that it becomes more likely than not that certain of the Company’s deferred tax assets will be realized. Alternatively, should our future income decrease from current levels, a resulting increase to all or a part of this valuation allowance could also have a significant negative impact on our operating results.
Leases	'
	Leases — A leased asset whose lease terms meet the criteria for capitalization is recorded as an asset and depreciated. If a lease does not meet the criteria for capitalization, it is classified as an operating lease and payments are recorded as rent expense. For 2013 and 2012 we had no leases that qualified as capital leases. Lease renewal options which we are “reasonably assured” of using and the related payments are taken into account when initially classifying and recording the lease as a capital lease obligation or as straight-line rent if an operating lease. Funds provided by the lessor for leasehold improvements are recorded as a deferred lease incentive and amortized as a reduction of rent expense over the lease term.
Revenue Recognition	'
	Revenue Recognition — We develop, market, and support applications that connect, protect and deliver information in a secure manner. Our services can be placed into several key revenue categories where each category has similar revenue recognition traits: Email Encryption, DLP, and BYOD email subscription-based services, various transaction fees and related professional services. The majority of the revenues generated are through a combination of direct sales and a network of resellers and other distribution partners.
	Under all product categories and distribution models, we recognize revenue after all of the following occur:
		•	persuasive evidence of an arrangement exists,
		•	delivery has occurred or services have been rendered,
		•	the price is fixed and determinable, and
		•	collectability is reasonably assured.
	Discounts provided to customers are recorded as reductions in revenue.
	Our Email Encryption, DLP and BYOD services are subscription services. Providing these services includes delivering subscribed-for software and providing secure electronic communications and customer support throughout the subscription period. Our subscribers generally execute multiple-year contracts that are irrevocable and non-refundable in nature and require annual, up-front payments. Subscription fees received from customers are initially recorded as deferred revenue and then recognized as revenue ratably over the subscription period. We do not offer stand alone services. Further, our services primarily include manufacturer provided warranty provisions. We recorded no warranty expense in any of the presented periods.
Software Development Costs	'
	Software Development Costs — Costs incurred in the development and testing of software used in the Company’s Email Encryption, DLP, and BYOD email services related to research, project planning, training, maintenance and general and administrative activities, and overhead costs are expensed as incurred. The costs of relatively minor upgrades and enhancements to the software are also expensed as incurred.
	Costs for the development of new software solutions and substantial enhancements to existing software solutions are expensed as incurred until technological feasibility has been established, at which time any additional costs would be capitalized. No research and development costs have been capitalized because we believe that technological feasibility is established concurrent with general release to customers.
Advertising Expense	'
	Advertising Expense — Advertising costs are expensed as incurred. Our continuing operations include advertising expense of $959 thousand, $538 thousand, and $544 thousand in 2013, 2012, and 2011, respectively.
Stock-Based Compensation	'
	Stock-Based Compensation — We currently use the straight-line amortization method for recognizing stock option and restricted stock compensation costs. The measurement and recognition of compensation expense for all share-based payment awards made to our employees, directors or outside service providers are based on the estimated fair value of the awards on the grant dates. The grant date fair value is estimated using either an option-pricing model which is consistent with the terms of the award or a market observed price, if such a price exists. Such cost is recognized over the period during which an employee, director or outside service provider is required to provide service in exchange for the award, i.e., “the requisite service period” (which is usually the vesting period). We also estimate the number of instruments that will ultimately be earned, rather than accounting for forfeitures as they occur.
Earnings Per Share ("EPS")	'
	Earnings Per Share (“EPS”) — Basic EPS is based on the weighted average number of common shares outstanding during each period. Diluted EPS adjusts Basic EPS for the effects of dilutive common stock equivalents outstanding during each period using the treasury stock method.
New Accounting Standards	'
	New Accounting Standards
	Presentation of Other Comprehensive Income
	In February 2013, the FASB issued guidance that requires entities to provide information about the amounts reclassified out of accumulated other comprehensive income by component and to present, either on the face of the statement where net income is presented or in the notes, significant amounts reclassified out of accumulated other comprehensive income by the respective items of net income. This new guidance did not have an impact on our consolidated financial statements.
	Unrecognized Tax Benefit
	In July 2013, the FASB issued guidance that requires entities to present unrecognized tax benefits (UTB) in the financial statements as a reduction to a deferred tax asset (DTA) for a net operating loss (NOL) carryforward when NOL’s exist. Entities whose NOL carryforwards are not available to settle taxes that would result from the disallowance of the tax position, or who do not intend to use their DTA for that purpose, should present their UTB as a liability and should not net the UTB with the DTA. The guidance becomes effective for us fiscal year 2014. We do not anticipate that this new guidance will have an impact on our consolidated financial statements.

Stock_Options_and_Stockbased_E1

Stock Options and Stock-based Employee Compensation (Tables)	12 Months Ended
	Dec. 31, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Summary of Common Stock Options	'
	Below is a summary of common stock options outstanding at December 31, 2013:
		Authorized			Options			Options			Available
		Shares			Outstanding			Vested			for Grant
	Employee and Director Stock Option Plans:
	1995 Long-term Incentive Plan		1,825,000			680,000			680,000			—
	1999 Director’s Stock Option Plan		975,000			83,292			83,292			—
	2001 Stock Option Plan		2,525,000			515,796			515,796			—
	2001 Employee Stock Option Plan		300,000			77,931			77,931			—
	2003 New Employee Stock Option Plan		500,000			16,400			14,399			—
	2004 Stock Option Plan		5,000,000			3,254,404			2,937,718			—
	2004 Director’s Stock Option Plan		300,000			160,000			160,000			—
	2006 Director’s Stock Option Plan		1,100,000			586,676			586,676			—
	2012 Incentive Plan		2,700,000			723,875			202,686			523,160
	Total employee and director stock option plans		15,225,000			6,098,374			5,258,498			523,160
	Executive Stock Option Agreements:
	Richard D. Spurr, Chairman, President and CEO		650,000			650,000			650,000			—
	Total		15,875,000			6,748,374			5,908,498			523,160
Summary of Stock-based Employee Compensation Expense	'
	For the twelve months ended December 31, 2013, 2012, and 2011, respectively, the total stock-based compensation expense resulting from stock options, restricted stock, and RSU’s was recorded to the following line items of our consolidated statement of income:
		Year Ended December 31,
	(In thousands)	2013			2012			2011
	Cost of revenues	$	172		$	136		$	71
	Research and development expenses		212			142			68
	Selling, general and administrative expenses		1,327			888			430
	Stock-based compensation expense	$	1,711		$	1,166		$	569
Schedule of Fair Value Option Award	'
	The following weighted average assumptions were applied in determining the fair value of options granted during the respective periods:
		Year Ended December 31,
		2013			2012			2011
	Risk-free interest rate		1.05	%		0.92	%		1.81	%
	Expected option life (years)		5.8			6			5.8
	Expected stock price volatility		69	%		74	%		75	%
	Expected dividend yield		—			—			—
	Fair value of options granted	$	1.99		$	1.72		$	2.48
Summary of all Stock Option Transactions	'
	The following is a summary of all stock option transactions for the three years ended December 31, 2013:
		Shares			Weighted			Weighted
					Average			Average
					Exercise			Remaining
					Price			Contractual
								Term (Yrs)
	Outstanding at January 1, 2011		7,646,892		$	4.42
	Granted at market price		536,500		$	3.83
	Cancelled or expired		(310,006	)	$	6.41
	Exercised		(725,936	)	$	2.46
	Outstanding at December 31, 2011		7,147,450		$	4.48
	Granted at market price		1,099,000		$	2.69
	Cancelled or expired		(386,706	)	$	4.69
	Exercised		(174,968	)	$	1.76
	Outstanding at December 31, 2012		7,684,776		$	4.28
	Granted at market price		150,000		$	3.27
	Cancelled or expired		(247,139	)	$	5.15
	Exercised		(839,263	)	$	2.03
	Outstanding at December 31, 2013		6,748,374		$	4.5			3.67
	Options exercisable at December 31, 2013		5,908,498		$	4.73			3.1
Summarized Information about Stock Options Outstanding by Range of Exercise Prices	'
	Summarized information about stock options outstanding at December 31, 2013, is as follows:
		Options Outstanding									Options Exercisable
	Range of	Number			Weighted			Weighted			Number		Weighted
	Exercise Prices	Outstanding			Average			Average			Exercisable		Average
					Remaining			Exercise					Exercise
					Contractual Life			Price					Price
	$1.11 - $1.99		711,697			3.01		$	1.52			711,697	$	1.52
	$2.00 - $3.49		1,923,433			6.61		$	2.72			1,198,070	$	2.71
	$3.50 - $4.99		2,578,652			3.59		$	4.34			2,464,139	$	4.36
	$5.00 - $5.99		286,500			0.77		$	5			286,500	$	5
	$6.00 - $8.99		455,300			0.76		$	6.45			455,300	$	6.45
	$9.00 - $11.00		792,792			0.14		$	10.72			792,792	$	10.72
			6,748,374			3.67		$	4.5			5,908,498	$	4.73
Summary of all Restricted Stock Activity	'
	The following is a summary of all restricted stock activity during the two years ended December 31, 2013:
		Restricted			Weighted
		Shares			Average
					Fair Value
	Outstanding at January 1, 2012		—			—
	Granted at market price		351,000		$	2.49
	Vested		—			—
	Cancelled		—			—
	Unvested restricted stock at December 31, 2012		351,000		$	2.49
	Granted at market price		385,000		$	3.45
	Vested		(87,750	)		2.49
	Cancelled		—			—
	Unvested restricted stock at December 31, 2013		648,250		$	3.06
Summary of all Restricted Stock Unit Activity	'
	The following is a summary of all RSU activity during the two years ended December 31, 2013:
		Restricted			Weighted
		Stock Units			Average
					Fair Value
	Non-vested at January 1, 2012		—			—
	Granted at market price		113,000		$	2.49
	Vested		—			—
	Cancelled		—			—
	Unvested restricted stock units at December 31, 2012		113,000		$	2.49
	Granted at market price		95,000		$	3.45
	Vested		(28,250	)		2.49
	Cancelled		—			—
	Unvested restricted stock units at December 31, 2013		179,750		$	3

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	12 Months Ended
	Dec. 31, 2013
Supplemental Cash Flow Elements [Abstract]	'
Supplemental Information Relating to Interest Taxes and Non Cash Activities	'
	Supplemental information relating to interest, taxes, and noncash activities:
		Year Ended December 31,
	(In thousands)	2013			2012		2011
	Cash interest paid	$	—		$	—	$	7
	Income tax payments	$	217		$	350	$	225
	Payables related to purchases of capitalized assets	$	(97	)	$	34	$	79
	Excess tax benefit on exercise of employee stock options	$	427		$	10	$	3,200

Receivables_net_Tables

Receivables, net (Tables)	12 Months Ended
	Dec. 31, 2013
Receivables [Abstract]	'
Summary of Net Receivables	'
	(In thousands)	2013			2012
	Gross accounts receivables	$	8,359		$	6,721
	Allowance for returns and doubtful accounts		(46	)		(28	)
	Unpaid portion of deferred revenue		(5,989	)		(5,726	)
	Note receivable		458			458
	Allowance for note receivable		(458	)		(458	)
	Receivables, net	$	2,324		$	967

Prepaid_and_other_current_asse1

Prepaid and other current assets (Tables)	12 Months Ended
	Dec. 31, 2013
Text Block [Abstract]	'
Schedule of Prepaid and Other Current Assets	'
	(In thousands)	2013			2012
	Prepaid insurance, maintenance, software licenses and other	$	1,489		$	1,502
	Deferred commissions		320			215
	Deferred rent		261			—
	Tax-related		(32	)		(20	)
	Prepaid and other current assets	$	2,038		$	1,697

Property_and_Equipment_Tables

Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2013
Property Plant And Equipment [Abstract]	'
Summary of Property and Equipment	'
	(In thousands)	2013			2012
	Computer and office equipment and software	$	22,550		$	23,807
	`Leasehold improvements		5,276			5,221
	Furniture and fixtures		1,520			1,504
			29,346			30,532
	Less accumulated depreciation and amortization		(26,738	)		(28,148	)
		$	2,608		$	2,384

Accrued_Expenses_Tables

Accrued Expenses (Tables)	12 Months Ended
	Dec. 31, 2013
Payables And Accruals [Abstract]	'
Summary of Accrued Expenses	'
		December 31,
	(In thousands)	2013		2012
	Employee compensation and benefits	$	872	$	790
	Professional fees		469		842
	Taxes		350		409
	Other		301		614
	Total accrued expenses	$	1,992	$	2,655

Earnings_Per_Share_and_Potenti1

Earnings Per Share and Potential Dilution (Tables)	12 Months Ended
	Dec. 31, 2013
Earnings Per Share [Abstract]	'
Computations of Basic and Diluted Earnings Per Share	'
	The computations for basic and diluted earnings per share for the years ended December 31, 2013, 2012, and 2011, are as follows:
		Year Ended December 31,
		2013		2012		2011
	Basic weighted average shares		61,139,035		62,211,228		65,439,078
	Effect of dilutive securities:
	Employee and director stock options		1,095,227		637,676		943,634
	Restricted Stock		225,741		20,003		—
	RSU’s		66,504		6,440		—
	Warrants		—		—		878,802
	Potential dilutive common shares		62,526,507		62,875,347		67,261,514

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Summary of Fixed Contractual Obligations and Commitments	'
	A summary of our fixed contractual obligations and commitments at December 31, 2013, is as follows:
	(In thousands)	2014		2015		2016		2017		2018		Thereafter		Total
	Operating leases	$	1,009	$	1,261	$	1,163	$	1,058	$	1,014	$	6,190	$	11,695

Income_Taxes_Tables

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2013
Income Tax Disclosure [Abstract]	'
Components of Income Taxes	'
	Components of the income taxes are as follows:
	(In thousands)	2013			2012			2011
	Current:
	U.S.	$	124		$	116		$	163
	State		148			164			122
	Foreign		123			66			(378	)
	Deferred
	Federal		(1,400	)		(2,300	)		(9,800	)
	State		—			—			(2,000	)
	Foreign		(1	)		5			4
	Income tax (benefit) expense	$	(1,006	)	$	(1,949	)	$	(11,889	)
Schedule of Reconciliation of Tax Benefit Expenses to Income Taxes	'
	A reconciliation of the expected U.S. tax (benefit) expense to income taxes is as follows:
	(In thousands)	2013			2012			2011
	Expected tax (benefit) expense at U.S. statutory rate	$	3,212		$	3,078		$	3,753
	Decrease in valuations allowance- Operations		(2,650	)		(2,912	)		(3,357	)
	Decrease in valuations allowance- Other		(1,400	)		(2,300	)		(9,900	)
	Nondeductible expense and nontaxable income		(370	)		21			(125	)
	State income taxes		98			108			(1,878	)
	Foreign income taxes		122			71			(374	)
	Other		(18	)		(15	)		(8	)
	Income tax (benefit) expense	$	(1,006	)	$	(1,949	)	$	(11,889	)
Components of Deferred Income Taxes	'
	Components of our deferred income taxes as of December 31, 2013 and 2012 are as follows:
	(In thousands)	2013			2012
	Deferred tax assets:
	Reserves- Other	$	251		$	218
	U.S. net operating loss carryforwards		88,562			91,396
	State net operating loss carryforwards		347			487
	Tax credit carryforwards		5,619			5,374
	Stock-based compensation		2,839			2,604
	Intangible assets		978			1,421
	Depreciable assets		1,430			1,451
	Other assets		649			323
	Total deferred tax assets		100,675			103,274
	Deferred tax liabilities:
	Prepaid expenses		(418	)		(410	)
	Total deferred tax assets		100,257			102,864
	Less valuation allowance		(46,209	)		(50,216	)
	Net deferred income taxes	$	54,048		$	52,648

Quarterly_Results_of_Operation1

Quarterly Results of Operations (Unaudited) (Tables)	12 Months Ended
	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]	'
Summary of Quarterly Results of Operations	'
	The following is a summary of the quarterly results of operations for the years ended December 31, 2013 and 2012:
		Quarter Ended
	(In thousands except per share data)	March 31		June 30		September 30		December 31
	2013
	Revenues	$	11,764	$	11,838	$	12,225	$	12,311
	Gross margin		9,828		9,935		10,321		10,440
	Net income		567		1,871		3,175		4,840
	Basic net income per common share*		0.01		0.03		0.05		0.08
	Diluted net income per common share*		0.01		0.03		0.05		0.08
	2012
	Revenues	$	10,301	$	10,343	$	11,023	$	11,689
	Gross margin		8,446		8,531		9,136		9,634
	Net income		2,426		2,643		1,943		3,991
	Basic net income per common share*		0.04		0.04		0.03		0.07
	Diluted net income per common share*		0.04		0.04		0.03		0.06

Summary_of_Significant_Account2

Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Significant Accounting Policies [Line Items]	'	'	'
Cash investments maturities	'3 months	'	'
Goodwill	$2,161,000	$2,161,000	'
Goodwill to total asset	2.00%	3.00%	'
Impairment	0	'	'
Accumulated deferred tax assets	-46,209,000	-50,216,000	'
Total deferred tax asset not subject to a valuation allowance	54,048,000	52,648,000	'
Temporary timing differences between GAAP and tax-related expense	5,700,000	'	'
Income tax credits	5,619,000	5,374,000	'
Alternative Minimum Tax credits	1,100,000	'	'
Recorded warranty expense	0	'	'
Research and development expenses	9,563,000	7,419,000	5,229,000
Advertising expense	959,000	538,000	544,000
Federal [Member]	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'
Federal net operating loss carryforwards	45,300,000	'	'
State [Member]	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'
Income tax credits	$2,000,000	'	'
Software [Member]	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'
Estimated useful lives of depreciated or amortized Property and equipment	'3 years	'	'
Computer Equipment [Member]	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'
Estimated useful lives of depreciated or amortized Property and equipment	'3 years	'	'
Office Equipment [Member]	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'
Estimated useful lives of depreciated or amortized Property and equipment	'3 years	'	'
Leasehold Improvements [Member]	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'
Estimated useful lives of depreciated or amortized Property and equipment	'5 years	'	'
Furniture and Fixtures [Member]	'	'	'
Schedule Of Significant Accounting Policies [Line Items]	'	'	'
Estimated useful lives of depreciated or amortized Property and equipment	'5 years	'	'

Stock_Options_and_Stockbased_E2

Stock Options and Stock-based Employee Compensation - Summary of Common Stock Options (Detail)	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary Of Stock Option Activities [Line Items]	'	'	'	'
Authorized Shares	15,875,000	'	'	'
Options Outstanding	6,748,374	7,684,776	7,147,450	7,646,892
Options Vested	5,908,498	'	'	'
Shares Available for Grant	523,160	'	'	'
Richard D. Spurr, Chairman, President and CEO [Member]	'	'	'	'
Summary Of Stock Option Activities [Line Items]	'	'	'	'
Authorized Shares	650,000	'	'	'
Options Outstanding	650,000	'	'	'
Options Vested	650,000	'	'	'
1995 Long-term Incentive Plan [Member]	'	'	'	'
Summary Of Stock Option Activities [Line Items]	'	'	'	'
Authorized Shares	1,825,000	'	'	'
Options Outstanding	680,000	'	'	'
Options Vested	680,000	'	'	'
1999 Director's Stock Option Plan [Member]	'	'	'	'
Summary Of Stock Option Activities [Line Items]	'	'	'	'
Authorized Shares	975,000	'	'	'
Options Outstanding	83,292	'	'	'
Options Vested	83,292	'	'	'
2001 Stock Option Plan [Member]	'	'	'	'
Summary Of Stock Option Activities [Line Items]	'	'	'	'
Authorized Shares	2,525,000	'	'	'
Options Outstanding	515,796	'	'	'
Options Vested	515,796	'	'	'
2001 Employee Stock Option Plan [Member]	'	'	'	'
Summary Of Stock Option Activities [Line Items]	'	'	'	'
Authorized Shares	300,000	'	'	'
Options Outstanding	77,931	'	'	'
Options Vested	77,931	'	'	'
2003 New Employee Stock Option Plan [Member]	'	'	'	'
Summary Of Stock Option Activities [Line Items]	'	'	'	'
Authorized Shares	500,000	'	'	'
Options Outstanding	16,400	'	'	'
Options Vested	14,399	'	'	'
2004 Stock Option Plan [Member]	'	'	'	'
Summary Of Stock Option Activities [Line Items]	'	'	'	'
Authorized Shares	5,000,000	'	'	'
Options Outstanding	3,254,404	'	'	'
Options Vested	2,937,718	'	'	'
2004 Director's Stock Option Plan [Member]	'	'	'	'
Summary Of Stock Option Activities [Line Items]	'	'	'	'
Authorized Shares	300,000	'	'	'
Options Outstanding	160,000	'	'	'
Options Vested	160,000	'	'	'
2006 Director's Stock Option Plan [Member]	'	'	'	'
Summary Of Stock Option Activities [Line Items]	'	'	'	'
Authorized Shares	1,100,000	'	'	'
Options Outstanding	586,676	'	'	'
Options Vested	586,676	'	'	'
2012 Incentive Plan [Member]	'	'	'	'
Summary Of Stock Option Activities [Line Items]	'	'	'	'
Authorized Shares	2,700,000	'	'	'
Options Outstanding	723,875	'	'	'
Options Vested	202,686	'	'	'
Shares Available for Grant	523,160	'	'	'
Employee and Director Stock Options [Member]	'	'	'	'
Summary Of Stock Option Activities [Line Items]	'	'	'	'
Authorized Shares	15,225,000	'	'	'
Options Outstanding	6,098,374	'	'	'
Options Vested	5,258,498	'	'	'
Shares Available for Grant	523,160	'	'	'

Stock_Options_and_Stockbased_E3

Stock Options and Stock-based Employee Compensation - Additional Information (Detail) (USD $)

12 Months Ended

12 Months Ended

12 Months Ended

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2010

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Dec. 31, 2013

Jan. 31, 2004

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

2012 Plan [Member]

Richard D. Spurr, Chairman, President and CEO [Member]

Stock Options [Member]

Stock Options [Member]

Stock Options [Member]

Executive Stock Option Agreements [Member]

Executive Stock Option Agreements [Member]

Options outstanding to non-employees [Member]

Employee and director stock options [Member]

Employee and director stock options [Member]

Richard D. Spurr, Chairman, President and CEO [Member]

Richard D. Spurr, Chairman, President and CEO [Member]

Share Based Compensation [Line Items]

'

'

'

'

'

'

'

'

'

'

'

'

'

'

Expiry of option

'10 years

'

'

'

'

'

'

'

'

'

'

'

'

'

Vesting period Of options

'3 years

'

'

'

'4 years

'

'

'

'

'

'

'

'

'

Shares available for issuance

15,875,000

'

'

'

2,700,000

650,000

'

'

'

650,000

'

'

'

'

Additional shares underlying options outstanding

'

'

'

'

1,327,000

'

'

'

'

'

'

'

'

'

Exercise price of common Stock

'

'

'

'

'

'

'

'

'

'

$10.80

'

'

'

Options vested and outstanding

5,908,498

'

'

'

'

650,000

'

'

'

650,000

'

'

'

'

Options outstanding to non-employees

'

'

'

'

'

'

'

'

'

'

'

55,000

'

'

Total unrecognized stock-based compensation related to non-vested stock-based compensation awards

$3,200,000

'

'

'

'

'

'

'

'

'

'

'

'

'

The number of years over which cost is expected to be recognized

'1 year 7 months 6 days

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock option exercised

839,263

174,968

725,936

'

'

'

'

'

'

'

'

'

'

'

Tax benefit from stock option exercised

427,000

10,000

3,200,000

'

'

'

'

'

'

'

'

'

'

'

Deferred tax assets, tax deferred expense compensation and benefits employee compensation

321,000

306,000

'

'

'

'

'

'

'

'

'

'

'

'

Options Outstanding

6,748,374

7,684,776

7,147,450

7,646,892

'

650,000

'

'

'

'

'

'

4,110,030

2,267,052

Options, options exercisable

5,908,498

'

'

'

'

'

'

'

'

'

'

'

3,270,154

1,657,907

Aggregate intrinsic value of options outstanding

'

'

'

'

'

'

'

'

'

'

'

'

6,600,000

2,000,000

Aggregate intrinsic value of options exercisable

'

'

'

'

'

'

'

'

'

'

'

'

5,200,000

1,800,000

Aggregate intrinsic value of options exercised

'

'

'

'

'

'

$1,900,000

$135,000

'

'

'

'

'

'

Number exercisable

5,908,498

'

'

'

'

'

'

6,412,505

7,034,356

'

'

'

'

'

Shares of common stock in reserve

0

'

'

'

'

'

'

'

'

'

'

'

'

'

Stock_Options_and_Stockbased_E4

Stock Options and Stock-based Employee Compensation - Summary of Stock-Based Employee Compensation Expense (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation expense	$1,711	$1,166	$569
Cost of revenues [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation expense	172	136	71
Research and development expenses [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation expense	212	142	68
Selling, general and administrative expenses [Member]	'	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'	'
Stock-based compensation expense	$1,327	$888	$430

Stock_Options_and_Stock_based_

Stock Options and Stock based Employee Compensation - Schedule of Fair Value Option Award (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'	'	'
Risk-free interest rate	1.05%	0.92%	1.81%
Expected option life (years)	'5 years 9 months 18 days	'6 years	'5 years 9 months 18 days
Expected stock price volatility	69.00%	74.00%	75.00%
Expected dividend yield	'	'	'
Fair value of options granted	$1.99	$1.72	$2.48

Stock_Options_and_Stockbased_E5

Stock Options and Stock-based Employee Compensation - Summary of All Stock Option Transactions (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Roll Forward]	'	'	'
Options, Outstanding, Beginning Balance	7,684,776	7,147,450	7,646,892
Weighted Average Exercise Price, Outstanding, Beginning Balance	$4.28	$4.48	$4.42
Options, Granted at market price	150,000	1,099,000	536,500
Options, Cancelled or expired	-247,139	-386,706	-310,006
Options, Exercised	-839,263	-174,968	-725,936
Options, Outstanding Ending Balance	6,748,374	7,684,776	7,147,450
Options, Options Exercisable	5,908,498	'	'
Weighted Average Exercise Price, Granted at market price	$3.27	$2.69	$3.83
Weighted Average Exercise Price, Cancelled or expired	$5.15	$4.69	$6.41
Weighted Average Exercise Price, Exercised	$2.03	$1.76	$2.46
Weighted Average Exercise Price, Outstanding, Ending Balance	$4.50	$4.28	$4.48
Weighted Average Exercise Price, Options exercisable	$4.73	'	'
Weighted Average Remaining Contractual Term, Outstanding	'3 years 8 months 1 day	'	'
Weighted Average Remaining Contractual Term, Options exercisable	'3 years 1 month 6 days	'	'

Stock_Options_and_Stock_based_1

Stock Options and Stock based Employee Compensation - Summarized Information about Stock Options Outstanding by Range of Exercise Prices (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Stock Options [Line Items]	'	'	'	'
Number Outstanding	6,748,374	7,684,776	7,147,450	7,646,892
Weighted Average Remaining Contractual Life, Options Outstanding	'3 years 8 months 1 day	'	'	'
Weighted Average Exercise Price, Options Outstanding	$4.50	'	'	'
Number exercisable	5,908,498	'	'	'
Weighted Average Exercise Price, Options Exercisable	$4.73	'	'	'
Range One [Member]	'	'	'	'
Schedule Of Stock Options [Line Items]	'	'	'	'
Range of Exercise Prices, Lower range	$1.11	'	'	'
Range of Exercise Prices, Upper range	$1.99	'	'	'
Number Outstanding	711,697	'	'	'
Weighted Average Remaining Contractual Life, Options Outstanding	'3 years 4 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$1.52	'	'	'
Number exercisable	711,697	'	'	'
Weighted Average Exercise Price, Options Exercisable	$1.52	'	'	'
Range Two [Member]	'	'	'	'
Schedule Of Stock Options [Line Items]	'	'	'	'
Range of Exercise Prices, Lower range	$2	'	'	'
Range of Exercise Prices, Upper range	$3.49	'	'	'
Number Outstanding	1,923,433	'	'	'
Weighted Average Remaining Contractual Life, Options Outstanding	'6 years 7 months 10 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$2.72	'	'	'
Number exercisable	1,198,070	'	'	'
Weighted Average Exercise Price, Options Exercisable	$2.71	'	'	'
Range Three [Member]	'	'	'	'
Schedule Of Stock Options [Line Items]	'	'	'	'
Range of Exercise Prices, Lower range	$3.50	'	'	'
Range of Exercise Prices, Upper range	$4.99	'	'	'
Number Outstanding	2,578,652	'	'	'
Weighted Average Remaining Contractual Life, Options Outstanding	'3 years 7 months 2 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$4.34	'	'	'
Number exercisable	2,464,139	'	'	'
Weighted Average Exercise Price, Options Exercisable	$4.36	'	'	'
Range Four [Member]	'	'	'	'
Schedule Of Stock Options [Line Items]	'	'	'	'
Range of Exercise Prices, Lower range	$5	'	'	'
Range of Exercise Prices, Upper range	$5.99	'	'	'
Number Outstanding	286,500	'	'	'
Weighted Average Remaining Contractual Life, Options Outstanding	'9 months 7 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$5	'	'	'
Number exercisable	286,500	'	'	'
Weighted Average Exercise Price, Options Exercisable	$5	'	'	'
Range Five [Member]	'	'	'	'
Schedule Of Stock Options [Line Items]	'	'	'	'
Range of Exercise Prices, Lower range	$6	'	'	'
Range of Exercise Prices, Upper range	$8.99	'	'	'
Number Outstanding	455,300	'	'	'
Weighted Average Remaining Contractual Life, Options Outstanding	'9 months 4 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$6.45	'	'	'
Number exercisable	455,300	'	'	'
Weighted Average Exercise Price, Options Exercisable	$6.45	'	'	'
Range Six [Member]	'	'	'	'
Schedule Of Stock Options [Line Items]	'	'	'	'
Range of Exercise Prices, Lower range	$9	'	'	'
Range of Exercise Prices, Upper range	$11	'	'	'
Number Outstanding	792,792	'	'	'
Weighted Average Remaining Contractual Life, Options Outstanding	'1 month 21 days	'	'	'
Weighted Average Exercise Price, Options Outstanding	$10.72	'	'	'
Number exercisable	792,792	'	'	'
Weighted Average Exercise Price, Options Exercisable	$10.72	'	'	'

Stock_Options_and_Stockbased_E6

Stock Options and Stock-based Employee Compensation - Summary of All Restricted Stock Activity (Detail) (Restricted Stock [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Restricted Shares, Outstanding Beginning ,Balance	351,000	'
Restricted Shares, Granted at market price	385,000	351,000
Restricted Shares, Vested	87,750	'
Restricted Shares, Cancelled	'	'
Restricted Shares, Unvested restricted stock , Ending balance	648,250	351,000
Weighted Average Fair Value, Outstanding ,Beginning balance	$2.49	'
Weighted Average Fair Value, Granted at market price	$3.45	$2.49
Weighted Average Fair Value, Vested	$2.49	'
Weighted Average Fair Value, Cancelled	'	'
Weighted Average Fair Value, Unvested restricted stock, Ending balance	$3.06	$2.49

Stock_Options_and_Stockbased_E7

Stock Options and Stock-based Employee Compensation - Summary of All Restricted Stock Unit Activity (Detail) (Restricted Stock Units (RSUs) [Member], USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012
Restricted Stock Units (RSUs) [Member]	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'
Restricted Shares, Outstanding Beginning ,Balance	113,000	'
Restricted Shares, Granted at market price	95,000	113,000
Restricted Shares, Vested	28,250	'
Restricted Shares, Cancelled	'	'
Restricted Shares, Unvested restricted stock , Ending balance	179,750	113,000
Weighted Average Fair Value, Outstanding ,Beginning balance	$2.49	'
Weighted Average Fair Value, Granted at market price	$3.45	$2.49
Weighted Average Fair Value, Vested	$2.49	'
Weighted Average Fair Value, Cancelled	'	'
Weighted Average Fair Value, Unvested restricted stock, Ending balance	$3	$2.49

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information - Supplemental Information Relating to Interest Taxes and Non Cash Activities (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Additional Cash Flow Elements And Supplemental Cash Flow Information [Abstract]	'	'	'
Cash interest paid	'	'	$7
Income tax payments	217	350	225
Payables related to purchases of capitalized assets	-97	34	79
Excess tax benefit on exercise of employee stock options	$427	$10	$3,200

Receivables_Net_Summary_of_Net

Receivables, Net - Summary of Net Receivables (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts Notes And Loans Receivable Net Current [Abstract]	'	'
Gross accounts receivables	$8,359	$6,721
Allowance for returns and doubtful accounts	-46	-28
Unpaid portion of deferred revenue	-5,989	-5,726
Note receivable	458	458
Allowance for note receivable	-458	-458
Receivables, net	$2,324	$967

Receivables_Net_Additional_Inf

Receivables, Net - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Gross accounts receivables	$8,359	$6,721
Percentage of doubtful debts on accounts receivable	2.50%	'
Note receivable on a product line	540	'
Date of note receivable, reserved	31-Dec-13	'
Tenant improvement allowance [Member]	'	'
Accounts, Notes, Loans and Financing Receivable [Line Items]	'	'
Gross accounts receivables	$863	'

Recovered_Sheet1

Prepaid and Other Current Assets - Schedule of Prepaid and Other Current Assets (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Prepaid Expense And Other Assets Current [Abstract]	'	'
Prepaid insurance, maintenance, software licenses and other	$1,489	$1,502
Deferred commissions	320	215
Deferred rent	261	'
Tax-related	-32	-20
Prepaid and other current assets	$2,038	$1,697

Property_and_Equipment_Summary

Property and Equipment - Summary of Property and Equipment (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Property, Plant and Equipment [Line Items]	'	'
Property and equipment gross	$29,346	$30,532
Less accumulated depreciation and amortization	-26,738	-28,148
Property and equipment, net	2,608	2,384
Computer and office equipment and software [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment gross	22,550	23,807
Leasehold Improvements [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment gross	5,276	5,221
Furniture and Fixtures [Member]	'	'
Property, Plant and Equipment [Line Items]	'	'
Property and equipment gross	$1,520	$1,504

Property_and_Equipment_Additio

Property and Equipment - Additional information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property Plant And Equipment [Abstract]	'	'	'
Depreciation and amortization	$1,466	$1,343	$1,373

Goodwill_Additional_Informatio

Goodwill - Additional Information (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]	'	'
Goodwill	$2,161	$2,161
Goodwill impairment	$0	'

Accrued_Expenses_Summary_of_Ac

Accrued Expenses - Summary of Accrued Expenses (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts Payable And Accrued Liabilities Current [Abstract]	'	'
Employee compensation and benefits	$872	$790
Professional fees	469	842
Taxes	350	409
Other	301	614
Total accrued expenses	$1,992	$2,655

Earnings_Per_Share_and_Potenti2

Earnings Per Share and Potential Dilution - Computations of Basic and Diluted Earnings Per Share (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Basic weighted average shares	61,139,035	62,211,228	65,439,078
Effect of dilutive securities:	'	'	'
Potential dilutive common shares	62,526,507	62,875,347	67,261,514
Employee and director stock options [Member]	'	'	'
Effect of dilutive securities:	'	'	'
Effect of dilutive securities	1,095,227	637,676	943,634
Restricted Stock [Member]	'	'	'
Effect of dilutive securities:	'	'	'
Effect of dilutive securities	225,741	20,003	'
Restricted Stock Units (RSUs) [Member]	'	'	'
Effect of dilutive securities:	'	'	'
Effect of dilutive securities	66,504	6,440	'
Warrants [Member]	'	'	'
Effect of dilutive securities:	'	'	'
Effect of dilutive securities	'	'	878,802

Earnings_Per_Share_and_Potenti3

Earnings Per Share and Potential Dilution - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee and director stock options [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Effect of dilutive securities	4,054,261	5,645,239	4,640,713
Restricted Stock [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Effect of dilutive securities	31,281	'	'
Restricted Stock Units (RSUs) [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Effect of dilutive securities	7,719	'	'
Warrants [Member]	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'
Effect of dilutive securities	'	'	145,853

Significant_Customers_Addition

Significant Customers - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
	Customer	Customer	Customer
Related Party Transactions [Abstract]	'	'	'
Customer accounted for revenue	0	0	0
Percentage of revenue generated	10.00%	10.00%	10.00%
Percentage of accounts receivables from one customer in net total	'	12.00%	'

Commitments_and_Contingencies_1

Commitments and Contingencies - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Commitments And Contingencies Disclosure [Abstract]	'	'	'
Rental expense on operating lease	$1.30	$1.30	$1.30
Operating leases, expiration year	'2024	'	'

Commitments_and_Contingencies_2

Commitments and Contingencies - Summary of Fixed Contractual Obligations and Commitments (Detail) (USD $)	Dec. 31, 2013
In Thousands, unless otherwise specified
Operating Leases Future Minimum Payments Due [Abstract]	'
2014	$1,009
2015	1,261
2016	1,163
2017	1,058
2018	1,014
Thereafter	6,190
Total	$11,695

Income_Taxes_Components_of_Inc

Income Taxes - Components of Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Current:	'	'	'
U.S.	$124	$116	$163
State	148	164	122
Foreign	123	66	-378
Deferred	'	'	'
Federal	-1,400	-2,300	-9,800
State	'	'	-2,000
Foreign	-1	5	4
Income tax (benefit) expense	($1,006)	($1,949)	($11,889)

Income_Taxes_Schedule_of_Recon

Income Taxes - Schedule of Reconciliation of Tax Benefit Expenses to Income Taxes (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Income Tax Disclosure [Abstract]	'	'	'
Expected tax (benefit) expense at U.S. statutory rate	$3,212	$3,078	$3,753
Decrease in valuations allowance- Operations	-2,650	-2,912	-3,357
Decrease in valuations allowance- Other	-1,400	-2,300	-9,900
Nondeductible expense and nontaxable income	-370	21	-125
State income taxes	98	108	-1,878
Foreign income taxes	122	71	-374
Other	-18	-15	-8
Income tax (benefit) expense	($1,006)	($1,949)	($11,889)

Income_Taxes_Components_of_Def

Income Taxes - Components of Deferred Income Taxes (Detail) (USD $)	Dec. 31, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Deferred tax assets:	'	'
Reserves- Other	$251	$218
U.S. net operating loss carryforwards	88,562	91,396
State net operating loss carryforwards	347	487
Tax credit carryforwards	5,619	5,374
Stock-based compensation	2,839	2,604
Intangible assets	978	1,421
Depreciable assets	1,430	1,451
Other assets	649	323
Total deferred tax assets	100,675	103,274
Deferred tax liabilities:	'	'
Prepaid expenses	-418	-410
Total deferred tax assets	100,257	102,864
Less valuation allowance	-46,209	-50,216
Net deferred income taxes	$54,048	$52,648

Income_Taxes_Additional_Inform

Income Taxes - Additional Informations (Detail) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]	'	'	'	'
Operating loss carryforwards	$88,562,000	$91,396,000	'	'
Change valuation allowance related to deferred tax assets	4,100,000	5,200,000	15,000,000	'
Deferred income tax reduction	'	'	11,800,000	'
Income tax benefit	'	'	3,200,000	'
Unrecognized deferred tax liability	'	'	'	327,000
Amount recognized uncertain tax positions	'	'	'	50,000
Unrecognized tax rate would impact effective tax rate	'	'	'	461,000
Unrecognized tax benefits to significantly increase or decrease	'12 months	'	'	'
Statute of limitations by major tax jurisdictions	'3 years	'	'	'
General Business Tax Credit Carry Forward [Member]	'	'	'	'
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]	'	'	'	'
Federal tax expense net/tax credit carryforwards	3,800,000	'	'	'
Tax credit carry forward began to expiration	'2014	'	'	'
State [Member]	'	'	'	'
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]	'	'	'	'
Federal tax expense net/tax credit carryforwards	1,900,000	'	'	'
Operating loss carryforwards, expiration dates	'2027	'	'	'
Internal Revenue Service (IRS) [Member]	'	'	'	'
Schedule Of Allocation Of Income Tax Expense Benefit [Line Items]	'	'	'	'
Operating loss carryforwards	$260,000,000	'	'	'
U.S. net operating loss carryforwards expire	'2020	'	'	'

Employee_Benefit_Plan_Addition

Employee Benefit Plan - Additional Informations (Detail) (USD $)	12 Months Ended
In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Compensation And Retirement Disclosure [Abstract]	'	'	'
Employees contribution of operating income	$297	$221	$185

ZixCorp_Repurchase_Program_Add

ZixCorp Repurchase Program - Additional Information (Detail) (USD $)	0 Months Ended		12 Months Ended			0 Months Ended
	Nov. 09, 2011	Mar. 07, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Nov. 06, 2013
						Maximum [Member]
Schedule Of Share Repurchase Programs [Line Items]	'	'	'	'	'	'
Share repurchase program authorized amount	$15,000,000	$15,000,000	'	'	'	$15,000,000
Shares repurchased	'	'	1,976,900	3,080,966	6,492,753	'
Treasury repurchase program	'	'	($8,760,000)	($9,000,000)	($20,999,000)	'

Quarterly_Results_of_Operation2

Quarterly Results of Operations (Unaudited) - Summary of Quarterly Results of Operations (Detail) (USD $)	3 Months Ended								12 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Quarterly Financial Information Disclosure [Abstract]	'	'	'	'	'	'	'	'	'	'	'
Revenues	$12,311	$12,225	$11,838	$11,764	$11,689	$11,023	$10,343	$10,301	$48,138	$43,356	$38,145
Gross margin	10,440	10,321	9,935	9,828	9,634	9,136	8,531	8,446	40,524	35,747	30,934
Net income	$4,840	$3,175	$1,871	$567	$3,991	$1,943	$2,643	$2,426	$10,453	$11,003	$22,554
Basic net income per common share	$0.08	$0.05	$0.03	$0.01	$0.07	$0.03	$0.04	$0.04	$0.17	$0.18	$0.34
Diluted net income per common share	$0.08	$0.05	$0.03	$0.01	$0.06	$0.03	$0.04	$0.04	$0.17	$0.17	$0.34