Zix (ZIXI) 10-Q 7 Nov 13 2013 Q3 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	9 Months Ended
	Sep. 30, 2013	Nov. 04, 2013
Document And Entity Information [Abstract]	'	'
Document Type	'10-Q	'
Amendment Flag	'false	'
Document Period End Date	30-Sep-13	'
Document Fiscal Year Focus	'2013	'
Document Fiscal Period Focus	'Q3	'
Trading Symbol	'ZIXI	'
Entity Registrant Name	'ZIX CORP	'
Entity Central Index Key	'0000855612	'
Current Fiscal Year End Date	'--12-31	'
Entity Filer Category	'Accelerated Filer	'
Entity Common Stock, Shares Outstanding	'	62,417,814

CONDENSED_CONSOLIDATED_BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Current assets:	'	'
Cash and cash equivalents	$32,876	$22,988
Receivables, net	2,765	967
Prepaid and other current assets	1,755	1,697
Deferred tax assets	1,654	1,600
Total current assets	39,050	27,252
Property and equipment, net	2,548	2,384
Goodwill	2,161	2,161
Deferred tax assets	50,909	51,052
Total assets	94,668	82,849
Current liabilities:	'	'
Accounts payable	409	501
Accrued expenses	2,194	2,655
Deferred revenue	19,546	17,470
Total current liabilities	22,149	20,626
Long-term liabilities:	'	'
Deferred revenue	1,346	902
Deferred rent	1,643	76
Total long-term liabilities	2,989	978
Total liabilities	25,138	21,604
Commitments and contingencies (see Note 7)	'	'
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; 74,337,869 issued and 62,410,110 outstanding in 2013 and 73,165,433 issued and 61,264,533 outstanding in 2012	736	728
Additional paid-in capital	358,531	355,747
Treasury stock, at cost; 11,927,759 common shares in 2013 and 11,900,900 common shares in 2012	-41,626	-41,506
Accumulated deficit	-248,111	-253,724
Total stockholders' equity	69,530	61,245
Total liabilities and stockholders' equity	$94,668	$82,849

CONDENSED_CONSOLIDATED_BALANCE1

CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Sep. 30, 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	74,337,869	73,165,433
Common stock, shares outstanding	62,410,110	61,264,533
Treasury stock, shares	11,927,759	11,900,900

CONDENSED_CONSOLIDATED_STATEME

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $)	3 Months Ended		9 Months Ended
In Thousands, except Share data, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]	'	'	'	'
Revenues	$12,225	$11,023	$35,827	$31,667
Cost of revenues	1,904	1,887	5,743	5,554
Gross margin	10,321	9,136	30,084	26,113
Operating expenses:	'	'	'	'
Research and development	2,345	2,046	7,444	4,988
Selling, general and administrative	4,659	5,020	16,807	13,720
Total operating expenses	7,004	7,066	24,251	18,708
Operating income	3,317	2,070	5,833	7,405
Other income, net	17	6	141	16
Income before income taxes	3,334	2,076	5,974	7,421
Income tax expense	-159	-133	-361	-409
Net Income	$3,175	$1,943	$5,613	$7,012
Basic income per common share	$0.05	$0.03	$0.09	$0.11
Diluted income per common share	$0.05	$0.03	$0.09	$0.11
Basic weighted average common shares outstanding	61,378,131	60,896,042	61,172,708	61,671,214
Diluted weighted average common shares outstanding	63,065,762	61,472,352	62,517,989	62,316,809

CONDENSED_CONSOLIDATED_STATEME1

CONDENSED CONSOLIDATED STATEMENT 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, 2012	$61,245	$728	$355,747	($41,506)	($253,724)
Beginning balance, shares at Dec. 31, 2012	'	73,165,433	'	'	'
Issuance of common stock upon exercise of stock options	1,494	8	1,486	'	'
Issuance of common stock upon exercise of stock options, shares	759,186	759,186	'	'	'
Issuance of common stock upon vesting of restricted stock units, shares	'	28,250	'	'	'
Issuance of restricted common stock	'	'	'	'	'
Issuance of restricted common stock, shares	'	385,000	'	'	'
Employee stock-based compensation costs	1,178	'	1,298	-120	'
Employee stock-based compensation costs, shares	'	'	'	'	'
Net income	5,613	'	'	'	5,613
Ending balance at Sep. 30, 2013	$69,530	$736	$358,531	($41,626)	($248,111)
Ending balance, shares at Sep. 30, 2013	'	74,337,869	'	'	'

CONDENSED_CONSOLIDATED_STATEME2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Operating activities:	'	'
Net income	$5,613	$7,012
Non-cash items in net income:	'	'
Depreciation and amortization	1,078	988
Employee stock-based compensation costs	1,298	796
Non-employee stock-based compensation costs	'	8
Changes in deferred taxes	89	82
Changes in operating assets and liabilities:	'	'
Receivables	-1,798	-452
Prepaid and other current assets	-58	189
Accounts payable	-72	75
Deferred revenue	2,520	2,520
Accrued and other liabilities	1,106	874
Net cash provided by operating activities	9,776	12,092
Investing activities:	'	'
Purchases of property and equipment	-1,262	-1,049
Net cash used in investing activities	-1,262	-1,049
Financing activities:	'	'
Proceeds from exercise of stock options	1,494	308
Purchase of treasury shares	-120	-9,000
Net cash provided by (used in) financing activities	1,374	-8,692
Increase in cash and cash equivalents	9,888	2,351
Cash and cash equivalents, beginning of period	22,988	20,680
Cash and cash equivalents, end of period	$32,876	$23,031

Basis_of_Presentation

Basis of Presentation	9 Months Ended
	Sep. 30, 2013
Accounting Policies [Abstract]	'
Basis of Presentation	'
	1. Basis of Presentation
	The accompanying condensed consolidated financial statements of Zix Corporation (“ZixCorp,” the “Company,” “we,” “our,” “us”) should be read in conjunction with the audited consolidated financial statements included in the Company’s 2012 Annual Report on Form 10-K. These financial statements are unaudited, but have been prepared in the ordinary course of business for the purpose of providing information with respect to the covered interim periods. Management of the Company believes that all adjustments necessary for a fair presentation for such periods have been included and are of a normal recurring nature. The results of operations for the three and nine-month periods ended September 30, 2013, are not necessarily indicative of the results to be expected for any future periods or for the full fiscal year.

Recent_Accounting_Standards_an

Recent Accounting Standards and Pronouncements	9 Months Ended
	Sep. 30, 2013
Accounting Changes And Error Corrections [Abstract]	'
Recent Accounting Standards and Pronouncements	'
	2. Recent Accounting Standards and Pronouncements
	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 line items of net income. This new guidance did not have an impact on our condensed consolidated financial statements.

Stock_Based_Awards_and_StockBa

Stock- Based Awards and Stock-Based Employee Compensation Expense	9 Months Ended
	Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Stock- Based Awards and Stock-Based Employee Compensation Expense	'
	3. Stock-Based Awards and Stock-Based Employee Compensation Expense
	Our stock-based awards include stock options, restricted stock, and restricted stock units (“RSU’s”). As of September 30, 2013, the Company had 6,840,091 stock options outstanding and 516,920 shares available for grant.
	Stock Option Activity
	There were 435,066 and 759,186 stock options exercised for the three and nine month periods ended September 30, 2013, respectively. There were 32,600 and 174,968 stock options exercised for the three and nine month periods ended September 30, 2012. There was a $373 thousand excess tax benefit recorded in the three month period ended September 30, 2013, related to the 435,066 option exercises. The excess tax benefit recorded in the nine month period ended September 30, 2013, related to the 759,186 option exercises was $420 thousand. A deferred tax asset totaling $243 thousand and $219 thousand, resulting from stock-based compensation expense associated with options relating to the Company’s U.S. operations, was recorded for the nine month periods ended September 30, 2013 and 2012, respectively.
	The following is a summary of all stock option transactions during the three months ended September 30, 2013:
		Options			Weighted		Weighted Average
					Average		Remaining
					Exercise Price		Contractual Term
							(Yrs)
	Outstanding at June 30, 2013		7,312,377		$	4.34
	Granted at market price		—			—
	Cancelled or expired		(37,220	)	$	7.29
	Exercised		(435,066	)	$	1.75
	Outstanding at September 30, 2013		6,840,091		$	4.49		4.02
	Options exercisable at September 30, 2013		5,857,319		$	4.75		3.24
	At September 30, 2013, we had 5,214,099 stock options outstanding and 4,231,327 options exercisable in which the exercise price was lower than the market price of the Company’s common stock. The aggregate intrinsic value of these options was $8.2 million and $6.3 million, respectively.
	For additional information regarding the Company’s Stock Options and Stock-based Employee Compensation, see Note 4 to the consolidated financial statements contained in our Annual Report on Form 10-K for the fiscal year ended December 31, 2012.
	Restricted Stock Activity
	The following is a summary of all restricted stock activity during the three months ended September 30, 2013:
		Restricted			Weighted
		Shares			Average
					Fair Value
	Outstanding at June 30, 2013		736,000		$	2.99
	Granted at market price		—			—
	Vested		(87,750	)		2.49
	Cancelled		—			—
	Unvested restricted stock at September 30, 2013		648,250		$	3.06
	Restricted Stock Unit Activity
	The following is a summary of all RSU activity during the three months ended September 30, 2013:
		Restricted			Weighted
		Stock Units			Average
					Fair Value
	Non-vested at June 30, 2013		208,000		$	2.93
	Granted at market price		—			—
	Vested		(28,250	)		2.49
	Cancelled		—			—
	Unvested restricted stock units at September 30, 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.
	Stock-Based Compensation Expense
	For the three and nine month periods ended September 30, 2013, the total stock-based employee compensation expense resulting from stock options, restricted stock, and RSU’s was recorded to the following line items of the Company’s condensed consolidated statements of income:
	(In thousands)	Three Months			Nine Months
		Ended September 30,			Ended September 30,
		2013			2013
	Cost of revenues	$	46		$	133
	Research and development		56			162
	Selling, general and administrative		349			1,003
	Stock-based compensation expense	$	451		$	1,298
	As of September 30, 2013, there was $3.8 million of total unrecognized stock-based compensation related to non-vested stock-based compensation awards granted under the incentive plans. This cost is expected to be recognized over a weighted average period of 1.68 years.

Supplemental_Cash_Flow_Informa

Supplemental Cash Flow Information	9 Months Ended
	Sep. 30, 2013
Supplemental Cash Flow Elements [Abstract]	'
Supplemental Cash Flow Information	'
	4. Supplemental Cash Flow Information
	Supplemental cash flow information relating to taxes and non-cash activities:
		Nine Months Ended September 30,
	(In thousands)	2013		2012
	Cash income tax payments	$	188	$	295
	Non-cash investing and financing activities:
	Payables related to purchases of fixed assets	$	20	$	14

Receivables_net

Receivables, net	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Receivables, net	'
	5. Receivables, net
	(In thousands)	September 30,			December 31,
		2013			2012
	Gross accounts receivable	$	8,610		$	6,721
	Allowance for returns and doubtful accounts		(50	)		(28	)
	Unpaid portion of deferred revenue		(5,795	)		(5,726	)
	Note receivable		458			458
	Allowance for note receivable		(458	)		(458	)
	Receivables, net	$	2,765		$	967
	The allowance for doubtful accounts includes all specific accounts receivable which we believe are likely not collectible 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 September 30, 2013.

Earnings_Per_Share_and_Potenti

Earnings Per Share and Potential Dilution	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Earnings Per Share and Potential Dilution	'
	6. 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 three and nine months ended September 30, 2013 and 2012, are as follows:
		Three Months ended September 30,				Nine Months ended September 30,
		2013		2012		2013		2012
	Basic weighted average shares		61,378,131		60,896,042		61,172,708		61,671,214
	Effect of dilutive securities:
	Employee and director stock options		1,342,060		553,717		1,073,873		638,064
	Restricted stock		268,504		17,091		208,805		5,697
	RSU’s		77,067		5,502		62,603		1,834
	Potential dilutive common shares		63,065,762		61,472,352		62,517,989		62,316,809
	During the three months ended September 30, 2013, weighted average shares related to 3,212,538 stock options were excluded from the calculation of diluted earnings per share because the exercise price of the awards was in excess of the market price and such awards are therefore anti-dilutive. During the nine months ended September 30, 2013, weighted average shares related to 4,387,246 stock options, 41,708 shares of restricted stock, and 10,292 RSU’s were excluded from the calculation of diluted earnings per share because the exercise price of the awards was in excess of the market price and such awards are therefore anti-dilutive. During the three and nine months ended September 30, 2012, weighted average shares of 5,947,939 and 5,536,358, respectively, related to stock options were excluded from the calculation of diluted earnings per share because the stock options were similarly anti-dilutive.

Commitments_and_contingencies

Commitments and contingencies	9 Months Ended
	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Commitments and contingencies	'
	7. Commitments and contingencies
	A summary of our fixed contractual obligations and commitments at September 30, 2013, is as follows:
		Payments Due by Period
	(In thousands)	Total		1 Year		Years 2 & 3		Years 4 & 5		Beyond 5 Years
	Operating leases	$	11,759	$	843	$	2,382	$	2,087	$	6,447
	We have not entered into any material, non-cancelable purchase commitments at September 30, 2013.
	Claims and Proceedings
	We may be subject to legal claims, litigation, and other legal proceedings. The expenses of those matters could be significant. There is no current or pending material legal proceeding. We expect no adverse effect on our operations or financial results as a result of the cost or other impacts of concluded legal proceedings.

Fair_Value_Measurements

Fair Value Measurements	9 Months Ended
	Sep. 30, 2013
Fair Value Disclosures [Abstract]	'
Fair Value Measurements	'
	8. 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.

Common_Stock_Repurchase_Progra

Common Stock Repurchase Program	9 Months Ended
	Sep. 30, 2013
Equity [Abstract]	'
Common Stock Repurchase Program	'
	9. Common Stock Repurchase Program
	During the three months ended September 30, 2013, the Company repurchased 26,859 shares at a cost of $120 thousand to offset the tax impact of vesting restricted awards. Of this amount, 13,747 shares at a cost of $61 thousand related to restricted stock awards and 13,112 shares at a cost of $59 thousand related to RSU’s. During the nine months ended September 30, 2012, the Company repurchased 3,080,966 shares at an aggregate cost of $9.0 million under a $15 million share repurchase program authorized by our board of directors announced November 9, 2011. This repurchase program was completed during the three months ended June 30, 2012.
	Subsequent to the balance sheet date, the Company’s board of directors approved a share repurchase. See footnote 11 to the condensed consolidated financial statements below.

Income_Taxes

Income Taxes	9 Months Ended
	Sep. 30, 2013
Income Tax Disclosure [Abstract]	'
Income Taxes	'
	10. Income Taxes
	At the end of 2012, the Company recorded a $2.3 million tax benefit by reducing the valuation allowance related to its deferred tax assets. This reduction was determined through an assessment of future deferred tax asset utilization following accounting guidance which relies largely on historical earnings. Using the same methodology, and updating the future taxable earnings estimates based on first, second and third quarter 2013 actual earnings, the Company believes its future U.S. federal taxable earnings estimate to be established at the end of 2013 will exceed the estimate used at the end of 2012. For this reason, the Company offset its first, second, and third quarter 2013 federal deferred tax provision by reducing its valuation allowance by an equal amount, thereby eliminating from its deferred tax provision federal taxes in excess of the estimated Alternative Minimum Tax from the Company’s first, second and third quarter 2013 financial statements. The Company will reevaluate the need for its valuation allowance at December 31, 2013, following the same assessment that was performed at December 31, 2012.

Subsequent_Events

Subsequent Events	9 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]	'
Subsequent Events	'
	11. Subsequent Events
	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 of common stock 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.

Recent_Accounting_Standards_an1

Recent Accounting Standards and Pronouncements (Policies)	9 Months Ended
	Sep. 30, 2013
Accounting Changes And Error Corrections [Abstract]	'
Presentation of Other Comprehensive Income	'
	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 line items of net income. This new guidance did not have an impact on our condensed consolidated financial statements.
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.

Stock_Based_Awards_and_StockBa1

Stock- Based Awards and Stock-Based Employee Compensation Expense (Tables)	9 Months Ended
	Sep. 30, 2013
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]	'
Summary of All Stock Option Transactions	'
	The following is a summary of all stock option transactions during the three months ended September 30, 2013:
		Options			Weighted		Weighted Average
					Average		Remaining
					Exercise Price		Contractual Term
							(Yrs)
	Outstanding at June 30, 2013		7,312,377		$	4.34
	Granted at market price		—			—
	Cancelled or expired		(37,220	)	$	7.29
	Exercised		(435,066	)	$	1.75
	Outstanding at September 30, 2013		6,840,091		$	4.49		4.02
	Options exercisable at September 30, 2013		5,857,319		$	4.75		3.24
Summary of All Restricted Stock Activity	'
	The following is a summary of all restricted stock activity during the three months ended September 30, 2013:
		Restricted			Weighted
		Shares			Average
					Fair Value
	Outstanding at June 30, 2013		736,000		$	2.99
	Granted at market price		—			—
	Vested		(87,750	)		2.49
	Cancelled		—			—
	Unvested restricted stock at September 30, 2013		648,250		$	3.06
Summary of All Restricted Stock Unit Activity	'
	The following is a summary of all RSU activity during the three months ended September 30, 2013:
		Restricted			Weighted
		Stock Units			Average
					Fair Value
	Non-vested at June 30, 2013		208,000		$	2.93
	Granted at market price		—			—
	Vested		(28,250	)		2.49
	Cancelled		—			—
	Unvested restricted stock units at September 30, 2013		179,750		$	3
Summary of Stock-Based Employee Compensation Expense	'
	For the three and nine month periods ended September 30, 2013, the total stock-based employee compensation expense resulting from stock options, restricted stock, and RSU’s was recorded to the following line items of the Company’s condensed consolidated statements of income:
	(In thousands)	Three Months			Nine Months
		Ended September 30,			Ended September 30,
		2013			2013
	Cost of revenues	$	46		$	133
	Research and development		56			162
	Selling, general and administrative		349			1,003
	Stock-based compensation expense	$	451		$	1,298

Supplemental_Cash_Flow_Informa1

Supplemental Cash Flow Information (Tables)	9 Months Ended
	Sep. 30, 2013
Supplemental Cash Flow Elements [Abstract]	'
Supplemental Cash Flow Information Relating to Taxes and Non-Cash Activities	'
	Supplemental cash flow information relating to taxes and non-cash activities:
		Nine Months Ended September 30,
	(In thousands)	2013		2012
	Cash income tax payments	$	188	$	295
	Non-cash investing and financing activities:
	Payables related to purchases of fixed assets	$	20	$	14

Receivables_net_Tables

Receivables, net (Tables)	9 Months Ended
	Sep. 30, 2013
Receivables [Abstract]	'
Summary of Net Receivables	'
	(In thousands)	September 30,			December 31,
		2013			2012
	Gross accounts receivable	$	8,610		$	6,721
	Allowance for returns and doubtful accounts		(50	)		(28	)
	Unpaid portion of deferred revenue		(5,795	)		(5,726	)
	Note receivable		458			458
	Allowance for note receivable		(458	)		(458	)
	Receivables, net	$	2,765		$	967

Earnings_Per_Share_and_Potenti1

Earnings Per Share and Potential Dilution (Tables)	9 Months Ended
	Sep. 30, 2013
Earnings Per Share [Abstract]	'
Computations of Basic and Diluted Earnings Per Share	'
	The computations for basic and diluted earnings per share for the three and nine months ended September 30, 2013 and 2012, are as follows:
		Three Months ended September 30,				Nine Months ended September 30,
		2013		2012		2013		2012
	Basic weighted average shares		61,378,131		60,896,042		61,172,708		61,671,214
	Effect of dilutive securities:
	Employee and director stock options		1,342,060		553,717		1,073,873		638,064
	Restricted stock		268,504		17,091		208,805		5,697
	RSU’s		77,067		5,502		62,603		1,834
	Potential dilutive common shares		63,065,762		61,472,352		62,517,989		62,316,809

Commitments_and_contingencies_

Commitments and contingencies (Tables)	9 Months Ended
	Sep. 30, 2013
Commitments And Contingencies Disclosure [Abstract]	'
Summary of Fixed Contractual Obligations and Commitments	'
	A summary of our fixed contractual obligations and commitments at September 30, 2013, is as follows:
		Payments Due by Period
	(In thousands)	Total		1 Year		Years 2 & 3		Years 4 & 5		Beyond 5 Years
	Operating leases	$	11,759	$	843	$	2,382	$	2,087	$	6,447

Stock_Based_Awards_and_StockBa2

Stock- Based Awards and Stock-Based Employee Compensation Expense - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Options outstanding	6,840,091	'	6,840,091	'	7,312,377
Shares available for grant	516,920	'	516,920	'	'
Stock options exercised	435,066	32,600	759,186	174,968	'
Tax benefit from stock option exercised	$373,000	'	$420,000	'	'
Deferred tax assets, tax deferred expense compensation and benefits employee compensation	243,000	219,000	243,000	219,000	'
Options, Options Exercisable	5,857,319	'	5,857,319	'	'
Total unrecognized stock-based compensation related to non-vested stock-based compensation awards	3,800,000	'	3,800,000	'	'
Number of years over which cost is expected to be recognized	'	'	'1 year 8 months 5 days	'	'
Stock Options [Member]	'	'	'	'	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'	'	'	'	'
Options outstanding	5,214,099	'	5,214,099	'	'
Options, Options Exercisable	4,231,327	'	4,231,327	'	'
Aggregate Intrinsic Value of Options Outstanding	8,200,000	'	8,200,000	'	'
Aggregate Intrinsic Value of Options Exercisable	$6,300,000	'	$6,300,000	'	'

Stock_Based_Awards_and_StockBa3

Stock- Based Awards and Stock-Based Employee Compensation Expense - Summary of All Stock Option Transactions (Detail) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding [Roll Forward]	'	'	'	'
Options, Outstanding, Beginning Balance	7,312,377	'	'	'
Options, Granted at market price	'	'	'	'
Options, Cancelled or expired	-37,220	'	'	'
Options, Exercised	-435,066	-32,600	-759,186	-174,968
Options, Outstanding Ending Balance	6,840,091	'	6,840,091	'
Options, Options Exercisable	5,857,319	'	5,857,319	'
Weighted Average Exercise Price, Outstanding, Beginning Balance	$4.34	'	'	'
Weighted Average Exercise Price, Granted at market price	'	'	'	'
Weighted Average Exercise Price, Cancelled or expired	$7.29	'	'	'
Weighted Average Exercise Price, Exercised	$1.75	'	'	'
Weighted Average Exercise Price, Outstanding, Ending Balance	$4.49	'	$4.49	'
Weighted Average Exercise Price, Options exercisable	$4.75	'	$4.75	'
Weighted Average Remaining Contractual Term, Outstanding	'4 years 7 days	'	'	'
Weighted Average Remaining Contractual Term, Options exercisable	'3 years 2 months 27 days	'	'	'

Stock_Based_Awards_and_StockBa4

Stock- Based Awards and Stock-Based Employee Compensation Expense - Summary of All Restricted Stock Activity (Detail) (Restricted Stock [Member], USD $)	3 Months Ended
	Sep. 30, 2013
Restricted Stock [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Restricted Shares, Outstanding at June 30, 2013	736,000
Restricted Shares, Granted at market price	'
Restricted Shares, Vested	-87,750
Restricted Shares, Cancelled	'
Restricted Shares, Unvested restricted stock at September 30, 2013	648,250
Weighted Average Fair Value, Outstanding at June 30, 2013	$2.99
Weighted Average Fair Value, Granted at market price	'
Weighted Average Fair Value, Vested	$2.49
Weighted Average Fair Value, Cancelled	'
Weighted Average Fair Value, Unvested restricted stock at September 30, 2013	$3.06

Stock_Based_Awards_and_StockBa5

Stock- Based Awards and Stock-Based Employee Compensation Expense - Summary of All Restricted Stock Unit Activity (Detail) (Restricted Stock Units (RSUs) [Member], USD $)	3 Months Ended
	Sep. 30, 2013
Restricted Stock Units (RSUs) [Member]	'
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]	'
Restricted Shares, Outstanding at June 30, 2013	208,000
Restricted Shares, Granted at market price	'
Restricted Shares, Vested	-28,250
Restricted Shares, Cancelled	'
Restricted Shares, Unvested restricted stock at September 30, 2013	179,750
Weighted Average Fair Value, Outstanding at June 30, 2013	$2.93
Weighted Average Fair Value, Granted at market price	'
Weighted Average Fair Value, Vested	$2.49
Weighted Average Fair Value, Cancelled	'
Weighted Average Fair Value, Unvested restricted stock at September 30, 2013	$3

Stock_Based_Awards_and_StockBa6

Stock- Based Awards and Stock-Based Employee Compensation Expense - Summary of Stock-Based Employee Compensation Expense (Detail) (USD $)	3 Months Ended	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Stock-based compensation expense	$451	$1,298
Cost of Revenues [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Stock-based compensation expense	46	133
Research and Development [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Stock-based compensation expense	56	162
Selling, General and Administrative [Member]	'	'
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]	'	'
Stock-based compensation expense	$349	$1,003

Supplemental_Cash_Flow_Informa2

Supplemental Cash Flow Information - Supplemental Cash Flow Information Relating to Taxes and Non-Cash Activities (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Additional Cash Flow Elements And Supplemental Cash Flow Information [Abstract]	'	'
Cash income tax payments	$188	$295
Non-cash investing and financing activities:	'	'
Payables related to purchases of fixed assets	$20	$14

Receivables_Net_Summary_of_Net

Receivables, Net - Summary of Net Receivables (Detail) (USD $)	Sep. 30, 2013	Dec. 31, 2012
In Thousands, unless otherwise specified
Accounts Notes And Loans Receivable Net Current [Abstract]	'	'
Gross accounts receivable	$8,610	$6,721
Allowance for returns and doubtful accounts	-50	-28
Unpaid portion of deferred revenue	-5,795	-5,726
Note receivable	458	458
Allowance for note receivable	-458	-458
Receivables, net	$2,765	$967

Receivables_Net_Additional_Inf

Receivables, Net - Additional Information (Detail) (USD $)	9 Months Ended
In Thousands, unless otherwise specified	Sep. 30, 2013
Receivables [Abstract]	'
Percentage of doubtful debts on accounts receivable	2.50%
Note receivable on a product line	$540
Date of note receivable, reserved	30-Sep-13

Earnings_Per_Share_and_Potenti2

Earnings Per Share and Potential Dilution - Computations of Basic and Diluted Earnings Per Share (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Basic weighted average shares	61,378,131	60,896,042	61,172,708	61,671,214
Effect of dilutive securities:	'	'	'	'
Potential dilutive common shares	63,065,762	61,472,352	62,517,989	62,316,809
Stock Options [Member]	'	'	'	'
Effect of dilutive securities:	'	'	'	'
Effect of dilutive securities	1,342,060	553,717	1,073,873	638,064
Restricted Stock [Member]	'	'	'	'
Effect of dilutive securities:	'	'	'	'
Effect of dilutive securities	268,504	17,091	208,805	5,697
Restricted Stock Units (RSUs) [Member]	'	'	'	'
Effect of dilutive securities:	'	'	'	'
Effect of dilutive securities	77,067	5,502	62,603	1,834

Earnings_Per_Share_and_Potenti3

Earnings Per Share and Potential Dilution - Additional Information (Detail)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Stock Options [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Effect of dilutive securities	3,212,538	5,947,939	4,387,246	5,536,358
Restricted Stock [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Effect of dilutive securities	'	'	41,708	'
Restricted Stock Units (RSUs) [Member]	'	'	'	'
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]	'	'	'	'
Effect of dilutive securities	'	'	10,292	'

Recovered_Sheet1

Commitments and Contingencies - Summary of Fixed Contractual Obligations and Commitments (Detail) (USD $)	Sep. 30, 2013
In Thousands, unless otherwise specified
Operating Leases Future Minimum Payments Due [Abstract]	'
Operating leases	$11,759
Operating leases, First Year	843
Operating leases Two and Three Years	2,382
Operating leases Four and Five Years	2,087
Operating leases, Beyond Five Years	$6,447

Common_Stock_Repurchase_Progra1

Common Stock Repurchase Program - Additional Information (Detail) (USD $)	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Equity, Class of Treasury Stock [Line Items]	'	'
Shares repurchased	26,859	3,080,966
Treasury repurchase program	$120,000	$9,000,000
Share repurchase program authorized amount	'	15,000,000
Restricted Stock [Member]	'	'
Equity, Class of Treasury Stock [Line Items]	'	'
Shares repurchased	13,747	'
Treasury repurchase program	61,000	'
Restricted Stock Units (RSUs) [Member]	'	'
Equity, Class of Treasury Stock [Line Items]	'	'
Shares repurchased	13,112	'
Treasury repurchase program	$59,000	'

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended
In Millions, unless otherwise specified	Dec. 31, 2012
Income Tax Disclosure [Abstract]	'
Change valuation allowance related to deferred tax assets	$2.30

Subsequent_Events_Additional_I

Subsequent Events - Additional Information (Detail) (USD $)	9 Months Ended	1 Months Ended
In Millions, unless otherwise specified	Sep. 30, 2012	Nov. 06, 2013
		Subsequent Event [Member]
		Maximum [Member]
Subsequent Event [Line Items]	'	'
Share repurchase program authorized amount	$15	$15