Stamps.com (STMP) 10-Q 11 May 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Document and Entity Information [Abstract]
Entity Registrant Name	STAMPS.COM INC
Entity Central Index Key	1082923
Current Fiscal Year End Date	-19
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		16,363,292
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15

CONSOLIDATED_BALANCE_SHEETS_un

CONSOLIDATED BALANCE SHEETS (unaudited) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, unless otherwise specified
Current assets:
Cash and cash equivalents	$66,312	$40,933
Short-term investments	5,967	6,482
Accounts receivable, net	11,983	12,325
Deferred income taxes	2,143	2,143
Other current assets	5,387	6,071
Total current assets	91,792	67,954
Property and equipment, net	29,590	30,427
Goodwill	66,893	66,893
Intangible assets, net	18,715	19,570
Long-term investments	9,143	10,215
Deferred income taxes	53,294	51,673
Other assets	9,483	7,999
Total assets	278,910	254,731
Current liabilities:
Accounts payable and accrued expenses	30,613	22,521
Deferred revenue	2,217	2,164
Contingent consideration, current	26,487	9,225
Total current liabilities	59,317	33,910
Contingent consideration, long-term	0	15,790
Total liabilities	59,317	49,700
Commitments and contingencies
Stockholders' equity:
Common stock, $.001 par value Authorized shares: 47,500 in 2015 and 2014 Issued shares: 29,142 in 2015 and 28,763 in 2014 Outstanding shares: 16,358 in 2015 and 15,997 in 2014	52	51
Additional paid-in capital	693,598	678,075
Treasury stock, at cost, 12,766 shares in 2015 and 2014	-172,410	-172,410
Accumulated deficit	-301,716	-300,746
Accumulated other comprehensive income	69	61
Total stockholders' equity	219,593	205,031
Total liabilities and stockholders' equity	$278,910	$254,731

CONSOLIDATED_BALANCE_SHEETS_un1

CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Thousands, except Per Share data, unless otherwise specified
Stockholders' equity
Common stock, par value (in dollars per share)	$0.00	$0.00
Common stock, shares authorized (in shares)	47,500	47,500
Common stock, shares issued (in shares)	29,142	28,763
Common stock, shares outstanding (in shares)	16,358	15,997
Treasury stock, shares (in shares)	12,766	12,766

CONSOLIDATED_STATEMENTS_OF_OPE

CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Revenues:
Service	$35,649		$25,643
Product	4,743		4,613
Insurance	2,662		1,993
PhotoStamps	989		1,049
Other	9		0
Total revenues	44,052		33,298
Cost of revenues (exclusive of amortization of intangible assets, which is included in general and administrative):
Service	6,271		4,369
Product	1,601		1,542
Insurance	923		688
PhotoStamps	830		846
Total cost of revenues	9,625		7,445
Gross profit	34,427		25,853
Operating expenses:
Sales and marketing	14,021		11,370
Research and development	4,282		2,916
General and administrative	7,771		4,197
Contingent consideration charges	10,512		0
Total operating expenses	36,586		18,483
(Loss) income from operations	-2,159		7,370
Interest and other income, net	69		136
(Loss) income before income taxes	-2,090		7,506
Income tax (benefit) expense	-1,120		172
Net (loss) income	($970)		$7,334
Net (loss) income per share
Basic (in dollars per share)	($0.06)		$0.45
Diluted (in dollars per share)	($0.06)		$0.44
Weighted average shares outstanding:
Basic (in shares)	16,156		16,222
Diluted (in shares)	16,156	[1]	16,664
[1]	Common equivalent shares are excluded from the diluted earnings per share calculation as their effect is anti-dilutive.

CONSOLIDATED_STATEMENTS_OF_COM

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Unaudited) [Abstract]
Net (loss) income	($970)	$7,334
Other comprehensive income:
Unrealized gain (loss) on investment	8	-9
Comprehensive (loss) income	($962)	$7,325

CONSOLIDATED_STATEMENTS_OF_CAS

CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Operating activities:
Net (loss) income	($970)	$7,334
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	1,837	804
Stock-based compensation expense	2,642	1,016
Deferred income taxes, net of additional paid-in capital	-1,455	0
Contingent consideration	10,512	0
Changes in operating assets and liabilities:
Accounts receivable	342	6,504
Other current assets	309	32
Other assets	-1,484	-247
Deferred revenue	53	-65
Accounts payable and accrued expenses	5,312	3,096
Net cash provided by operating activities	17,098	18,474
Investing activities:
Sale of short-term investments	1,583	768
Purchase of short-term investments	-1,081	-1,340
Sale of long-term investments	1,093	1,419
Purchase of long-term investments	0	-2,868
Purchase of property and equipment	-132	-1,106
Net cash provided by (used in) investing activities	1,463	-3,127
Financing activities:
Proceeds from short term financing obligation	3,142	0
Proceeds from exercise of stock options	776	571
Issuance of common stock under ESPP	2,900	656
Net cash provided by financing activities	6,818	1,227
Net increase in cash and cash equivalents	25,379	16,574
Cash and cash equivalents at beginning of period	40,933	66,674
Cash and cash equivalents at end of period	66,312	83,248
Supplemental Information:
Capital expenditures accrued but not paid at period end	$19	$34

Summary_of_Significant_Account

Summary of Significant Accounting Policies	3 Months Ended
	Mar. 31, 2015
Summary of Significant Accounting Policies [Abstract]
Summary of Significant Accounting Policies	1	Summary of Significant Accounting Policies
	Basis of Presentation
	We prepared the consolidated financial statements included herein pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with United States (“U.S.”) generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. We believe that the disclosures are adequate to make the information presented not misleading. We recommend that these financial statements be read in conjunction with the audited financial statements and the notes thereto included in our latest annual report on Form 10-K for the fiscal year ended December 31, 2014, filed with the SEC on March 16, 2015.
	In our opinion, these unaudited financial statements contain all adjustments (consisting of normal recurring adjustments) necessary to present fairly our financial position as of March 31, 2015, our results of operations for the three months ended March 31, 2015 and our cash flows for the three months ended March 31, 2015.  The results of operations for the interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2015.
	Principles of Consolidation
	The consolidated financial statements include the accounts of Stamps.com Inc., Auctane LLC, Interapptive, Inc. and PhotoStamps Inc.  In June 2014, we completed our acquisition of 100% of the outstanding equity of Auctane LLC, the Texas limited liability company that operates ShipStation (“Auctane LLC” or “ShipStation”) in a cash and contingent stock transaction.  ShipStation, based in Austin, Texas, offers monthly subscription based e-commerce shipping software primarily under the brand ShipStation and Auctane.  In August 2014, we completed our acquisition of 100% of the outstanding equity of Interapptive, Inc., the Missouri corporation that operates ShipWorks (“Interapptive, Inc.” or “ShipWorks”) in a cash transaction.  ShipWorks, based in St Louis, Missouri, offers monthly subscription based e-commerce shipping software.
	Because 100% of the voting control of Auctane LLC and Interapptive, Inc. is held by us, we have consolidated ShipStation and ShipWorks from the date we obtained control in the accompanying consolidated financial statements. Similarly, due to our 100% control, PhotoStamps Inc. is also consolidated in the accompanying consolidated financial statements from the date of its inception. All significant intercompany accounts and transactions have been eliminated.
	Use of Estimates and Risk Management
	The preparation of financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the amounts reported in the financial statements and the accompanying notes.  Actual results could differ from those estimates, and such differences may be material to the financial statements. Examples include estimates of loss contingencies, promotional coupon redemptions, the number of PhotoStamps retail boxes that will not be redeemed, deferred income taxes, the estimates and assumptions used to calculate the allocation of the purchase price related to our acquisitions, including related contingent consideration, and estimates regarding the useful lives of our building, patents and other amortizable intangible assets.
	Fair Value of Financial Instruments
	Carrying amounts of certain of our financial instruments, including cash, cash equivalents, accounts receivable and accounts payable, approximate fair value due to their short maturities. The fair values of investments are determined using quoted market prices for those securities or similar financial instruments.
	Certain contingent consideration may be payable by us in connection with our acquisition of ShipStation. The fair value of the contingent consideration is determined using valuation techniques that replicate the pay-off structure of the earn-out provision in the ShipStation transaction, and the value of each of these options was determined using the Black-Scholes-Merton option pricing framework.  During the first quarter of 2015 we incurred approximately $10.7 million of charges relating to our contingent consideration liability of which $10.5 million was recorded in contingent consideration charges and $185,000 was recorded in marketing and research and development in operating expenses.  Contingent consideration liability was approximately $26.5 million as of March 31, 2015.
	Property and Equipment
	We account for property and equipment at cost less accumulated depreciation and amortization. We compute depreciation using the straight-line method over the estimated useful life of the asset, generally three to five years for furniture, fixtures and equipment and ten to forty years for building and building improvements. We have a policy of capitalizing expenditures that materially increase assets’ useful lives and charging ordinary maintenance and repairs to operations as incurred. When property or equipment is disposed of, the cost and related accumulated depreciation and amortization are removed, and any gain or loss is included in operations.
	Goodwill
	Goodwill represents the excess of the fair value of consideration given over the fair value of the tangible assets, identifiable intangible assets and liabilities assumed in a business combination.  We are required to test goodwill for impairment annually and whenever events or circumstances indicate the fair value of a reporting unit may be below its carrying value. Goodwill will be reviewed for impairment annually on October 1 utilizing a qualitative assessment or a two-step process.
	Trademarks, Patents and Intangible Assets
	Acquired trademarks, patents and other intangibles include both amortizable and non-amortizable assets and are included in intangible assets, net in the accompanying consolidated balance sheets. Intangible assets are carried at cost less accumulated amortization. Cost associated with internally developed intangible assets is typically expensed as incurred as research and development costs.  Amortization of amortizable intangible assets is calculated on a straight-line basis over the estimated useful lives of the assets, ranging from approximately 4 to 17 years.
	Impairment of Long-Lived Assets and Intangible Assets
	Long-lived assets including intangible assets with definitive useful lives are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future net cash flows expected to be generated by the asset.  If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets.  Assets to be disposed of are reported at the lower of the carrying amount or fair value less costs to sell.
	Intangible assets that have indefinite useful lives are not amortized but, instead, tested at least annually for impairment while intangible assets that have finite useful lives continue to be amortized over their respective useful lives.  Intangible assets with finite lives are reviewed for impairment when events and circumstances indicate that the intangible asset might be impaired.
	Intangible assets are tested for impairment, when required, using a two-step process.  The first step is to determine the fair value of the reporting unit, which may be calculated using a discounted cash flow methodology, and compare this value to its carrying value.  If the fair value exceeds the carrying value, no further work is required, and no impairment loss would be recognized.  If the fair value is less than the carrying value, the second step is performed. The second step is an allocation of the fair value of the reporting unit to all of the reporting unit's assets and liabilities under a hypothetical purchase price allocation.  Based on the ongoing evaluations performed by us, there was no impairment of intangible assets during the year ended December 31, 2014.
	Income Taxes
	We account for income taxes in accordance with Financial Accounting Standards Board (“FASB”) ASC Topic No. 740, Income Taxes (“ASC 740”), which requires that deferred tax assets and liabilities be recognized using enacted tax rates for the effect of temporary differences between the book and tax basis of recorded assets and liabilities. ASC 740 also requires that deferred tax assets be reduced by a valuation allowance if it is more likely than not that some or all of the net deferred tax assets will not be realized. We record a valuation allowance to reduce our gross deferred tax assets, which are primarily comprised of U.S. Federal and State tax loss carry-forwards, to the amount that is more likely than not (a likelihood of more than 50 percent) to be realized.  In order for us to realize our deferred tax assets, we must be able to generate sufficient taxable income. We evaluate the appropriateness of our deferred tax assets and related valuation allowance in accordance with ASC 740 based on all available positive and negative evidence. As of March 31, 2015 and December 31, 2014 we do not have any valuation allowance recorded to reduce our gross deferred tax assets as we believe we have met the more likely than not threshold we will realize our tax loss carry-forwards in the foreseeable future.
	Deferred Revenue
	Our deferred revenue relates to service revenue and PhotoStamps retail boxes.  Deferred revenue related to our service revenue generally arises due to the timing of payment versus the provision of services for certain customers billed in advance.  We sell our PhotoStamps retail boxes to our customers through our website and selected third parties.  Proceeds from the sale of our PhotoStamps retail boxes are initially recorded as a liability when received. We record the liability for outstanding PhotoStamps retail boxes in deferred revenue.
	Revenue Recognition
	We recognize revenue from product sales or services rendered, as well as commissions from advertising or sale of products by third party vendors to our customer base when the following four revenue recognition criteria are met: persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the selling price is fixed or determinable, and collectability is reasonably assured.
	Service revenue is primarily derived from monthly subscription and transaction fees and is recognized in the period that services are provided. Product sales, net of return allowances, are recorded when the products are shipped and title passes to customers. Sales of items, including PhotoStamps, sold to customers are made pursuant to a sales contract that provides for transfer of both title and risk of loss upon our delivery to the carrier. Return allowances for expected product returns, which reduce product revenue, are estimated using historical experience. Commissions from the advertising or sale of products by a third party vendor to our customer base are recognized when the revenue is earned and collection is deemed probable.
	Customers typically pay face value for postage purchased for use through our mailing and shipping software, and the funds are transferred directly from the customers to the United States Postal Services (“USPS”). We do not recognize revenue for this postage, as it is purchased by our customers directly from the USPS.
	PhotoStamps revenue, which includes the face value of postage, from the sale of PhotoStamps sheets and rolls is made pursuant to a sales contract that provides for transfer of both title and risk of loss upon our delivery to the carrier.
	Sale of PhotoStamps retail boxes are initially recorded as deferred revenue.  PhotoStamps revenue related to the sale of these PhotoStamps retail boxes is subsequently recognized when either: 1) the PhotoStamps retail box is redeemed, or 2) the likelihood of the PhotoStamps retail box being redeemed is deemed remote (“breakage”) and there is no legal obligation to remit the value of the unredeemed PhotoStamps retail boxes.
	On a limited basis, we allow third parties to offer products and promotions to our customer base. These arrangements generally provide payment in the form of a flat fee or revenue sharing arrangements where we receive payment upon customers accessing third party products and services. During the first quarter of 2015 and 2014 revenue from such advertising arrangements was not significant.
	We provide our customers with the opportunity to purchase parcel insurance directly through our solutions. Insurance revenue represents the gross amount charged to the customer for purchasing insurance and the related cost represents the amount paid to our insurance brokers. We recognize revenue on insurance purchases upon the ship date of the insured package.
	PhotoStamps Retail Boxes
	We sell PhotoStamps retail boxes that are redeemable for PhotoStamps on our website.  The PhotoStamps retail boxes are sold through various third party retail partners.  Our PhotoStamps retail boxes are not subject to administrative fees on unredeemed boxes and have no expiration date.  PhotoStamps retail box sales are recorded as deferred revenue.  We concluded that sufficient company-specific historical evidence existed to determine the period of time after which the likelihood of the PhotoStamps retail boxes being redeemed was remote.  Based on our analysis of the redemption data, we estimate that period of time to be 60 months after the sale of our PhotoStamps retail boxes.
	We recognize breakage revenue related to our PhotoStamps retail boxes utilizing the redemption recognition method. Under the redemption recognition method, we recognize breakage revenue from unredeemed retail boxes in proportion to the revenue recognized from the retail boxes that have been redeemed.  Revenue from our PhotoStamps retail boxes is included in PhotoStamps revenue. During first quarter of 2015 and 2014 PhotoStamps retail box breakage revenue was not significant.
	Short- term financing obligation
	We utilize short-term financing to fund certain company operation.  We have $3.1 million in short-term financing obligations, which is included in accounts payable and accrued expenses and $3.9 million of unused credit, as of March 31, 2015.
	Subsequent Events
	We are not aware of any material subsequent events or transactions that have occurred that would require recognition in the financial statements or disclosure in the notes to the consolidated financial statements.

Acquisition

Acquisition	3 Months Ended
	Mar. 31, 2015
Acquisition [Abstract]
Acquisition	2	Acquisition
	Endicia Acquisition
	On March 22, 2015 we entered into a Stock Purchase Agreement (“Stock Purchase Agreement”) with PSI Systems, Inc., a California corporation d/b/a Endicia (“Endicia”), and Newell Rubbermaid Inc., a Delaware corporation (“Parent”).  Endicia, based in Palo Alto, California, is a leading provider of high volume shipping technologies and solutions for shipping with the USPS.  The Stock Purchase Agreement provides for our purchase of all of the issued and outstanding shares of common stock of Endicia from a wholly-owned indirect subsidiary of Parent (“Transaction”) for an aggregate purchase price of $215 million in cash.  The purchase price is subject to adjustment for changes in Endicia’s net working capital as of the date of the closing of the Transaction and certain transaction expenses and closing cash adjustments. The closing of the Transaction is subject to various customary conditions, including, regulatory approval. The Transaction is not subject to a shareholder approval requirement.
	Stamps.com and Parent have certain rights to terminate the Stock Purchase Agreement including if the closing of the Transaction has not occurred on or prior to the date that is six months from the date of the Stock Purchase Agreement (“Termination Date”), provided , however , that the Termination Date will be automatically extended up to a date that is eighteen months after the date of the Stock Purchase Agreement in circumstances principally related to antitrust approval having not yet been obtained; provided , further , that under certain circumstances Parent can reduce the Termination Date to be a date that is twelve (12) months after the date of the Stock Purchase Agreement if we have not provided certain assurances as to extensions of our credit arrangements for the Transaction or other alternatives to such extensions.
	In the event that the Stock Purchase Agreement is terminated under certain circumstances related to the failure to obtain antitrust regulatory approval, the Stock Purchase Agreement provides for us to pay to Parent $10,750,000.
	Concurrent with the signing of the Stock Purchase Agreement, we entered into a financing commitment letter (“Commitment Letter”) with Wells Fargo Bank, National Association (“Wells Fargo Bank”), Wells Fargo Securities, LLC, Bank of America, N.A. (“Bank of America”), Merrill Lynch, Pierce, Fenner & Smith Incorporated, J.P. Morgan Chase Bank, N.A. (“JPMorgan” and, collectively with Wells Fargo Bank and Bank of America, the “Lead Lenders”), and J.P. Morgan Securities LLC. The Commitment Letter provides, on the terms and subject to the conditions set forth in the Commitment Letter, for a secured term loan facility in an aggregate principal amount of $82.5 million (“Term Loan”) and a secured revolving credit facility in an aggregate principal amount of $82.5 million (the “Revolving Credit Facility,” and together with the Term Loan, the “Credit Facilities”). The proceeds of the Term Loan will be used to finance a portion of the Purchase Price and for the payment of fees and expenses incurred in connection with the entering into the Stock Purchase Agreement and the Credit Facilities. The Revolving Credit Facility will be used to finance a portion of the Purchase Price and for our ongoing working capital and other general corporate purposes. We expect the financing under the Commitment Letter, together with cash balances, to be sufficient to provide the financing necessary to pay the Purchase Price. The financing commitments of the Lead Lenders are subject to certain limited conditions set forth in the Commitment Letter.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies [Abstract]
Commitments and Contingencies	3	Commitments and Contingencies
	Legal Proceedings
	On August 14, 2014, Rapid Enterprises, LLC, D/B/A Express One, filed suit against ShipStation and some of its executives in the Third Judicial District Court for Salt Lake County, Utah, alleging, among other claims, that ShipStation breached its contract with Express One by violating an exclusivity provision. Express One seeks an injunction, damages, attorneys’ fees and court costs.  On December 12, 2014, Express One added additional claims and Stamps.com and our Chief Executive Officer as named defendants.  The litigation is in the discovery phase.
	We are a party to various legal proceedings, including those noted in this section. We have established loss provisions only for matters in which losses are probable and can be reasonably estimated. Although management at present believes that the ultimate outcome of these proceedings, individually and in the aggregate, will not materially harm our financial position, results of operations, cash flows, or overall trends, legal proceedings are subject to inherent uncertainties, and unfavorable rulings or other events could occur. An unfavorable outcome for an amount in excess of management’s present beliefs may result in a material adverse impact on our business, results of operations, financial position, and overall trends.
	Commitments
	The following table is a schedule of our significant contractual obligations and commercial commitments, which consist only of future minimum lease payments under operating leases as of March 31, 2015 (in thousands):
	Twelve Month Period Ending March 31,		Operating
			Lease Obligations
	2016		$	437
	2017			262
	2018			267
	2019			204
	Thereafter			—

Net_Loss_Income_per_Share

Net (Loss) Income per Share	3 Months Ended
	Mar. 31, 2015
Net (Loss) Income per Share [Abstract]
Net (Loss) Income per Share	4	Net (Loss) Income per Share
	Net (loss) income per share represents net (loss) income attributable to common stockholders divided by the weighted average number of common shares outstanding during a reported period. The diluted net (loss) income per share reflects the potential dilution that could occur if securities or other contracts to issue common stock, including stock options (commonly and hereafter referred to as “common stock equivalents”), were exercised or converted into common stock. Diluted net (loss) income per share is calculated by dividing net (loss) income during a reported period by the sum of the weighted average number of common shares outstanding plus common stock equivalents for the period.
	The following table reconciles share amounts utilized to calculate basic and diluted net (loss) income per share (in thousands, except per share data):
			Three Months Ended
			March 31,
			2015			2014
	Net (loss) income		$	(970	)	$	7,334
	Basic - weighted average common shares			16,156			16,222
	Diluted effect of common stock equivalents			—	(1)		442
	Diluted - weighted average common shares			16,156			16,664
	(Loss) earnings per share:
	Basic		$	(0.06	)	$	0.45
	Diluted		$	(0.06	)	$	0.44
	(1) Common equivalent shares are excluded from the diluted (loss) earnings per share calculation as their effect is anti-dilutive.
	The calculation of dilutive shares excludes the effect of the following options that are considered anti-dilutive (in thousands):
			Three Months Ended
			March 31,
			2015			2014
	Anti-dilutive stock option shares			3,006			109

StockBased_Employee_Compensati

Stock-Based Employee Compensation	3 Months Ended
	Mar. 31, 2015
Stock-Based Employee Compensation [Abstract]
Stock-Based Employee Compensation	5	Stock-Based Employee Compensation
	We estimate the fair value of share-based payment awards on the date of grant using an option-pricing model and recognize stock-based compensation expense during each period based on the value of that portion of share-based payment awards that is ultimately expected to vest during the period, reduced for estimated forfeitures. We estimate forfeitures at the time of grant based on historical data and revise, if necessary, in subsequent periods if actual forfeitures differ from those estimates. Compensation expense recognized for all employee stock options granted is recognized using the straight-line method over their respective vesting periods of up to five years.
	The following table sets forth the stock-based compensation expense that we recognized for the periods indicated (in thousands):
			Three Months Ended
			March 31,
			2015			2014
	Stock-based compensation expense relating to:
	Employee and director stock options		$	2,528		$	900
	Employee stock purchases			114			116
	Total stock-based compensation expense		$	2,642		$	1,016
	Stock-based compensation expense relating to:
	Cost of revenues		$	167		$	101
	Sales and marketing			722			193
	Research and development			548			236
	General and administrative			1,205			486
	Total stock-based compensation expense		$	2,642		$	1,016
	We use the Black-Scholes option valuation model to estimate the fair value of share-based payment awards on the date of grant, which requires us to make a number of subjective assumptions, including stock price volatility, expected term, and risk-free interest rates. In the case of options we grant, our assumption of expected volatility is based on the historical volatility of our stock price over the term equal to the expected life of the options. We base the risk-free interest rate on U.S. Treasury zero-coupon issues with a remaining term equal to the expected life of the options assumed at the date of grant.  The estimated expected life represents the weighted-average period the stock options are expected to remain outstanding, determined based on an analysis of historical exercise behavior.
	The following are the weighted average assumptions used in the Black-Scholes valuation model for the periods indicated:
			Three Months Ended
			March 31,
			2015			2014
	Expected dividend yield			—			—
	Risk-free interest rate			1	%		0.7	%
	Expected volatility			46.14	%		49.7	%
	Expected life (in years)			3.4			3.6
	Expected forfeiture rate			6	%		6	%

Goodwill_and_Intangible_Assets

Goodwill and Intangible Assets	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets [Abstract]
Goodwill and Intangible Assets	6	Goodwill and Intangible Assets
	Goodwill represents the excess of the fair value of consideration given over the fair value of the tangible assets, identifiable intangible assets and liabilities assumed in a business combination.  Goodwill was approximately $66.9 million as of March 31, 2015 and December 31, 2014.
	Goodwill is reviewed for impairment annually in October utilizing a qualitative assessment or a two-step process.  We have an option to make a qualitative assessment of a reporting unit's goodwill for impairment.  If we choose to perform a qualitative assessment and determine the fair value more likely than not exceeds the carrying value, no further evaluation is necessary.  For reporting units where we perform the two-step process, the first step requires us to compare the fair value of each reporting unit, which we primarily determine using an income approach based on the present value of discounted cash flows, to the respective carrying value, which includes goodwill.  If the fair value of the reporting unit exceeds its carrying value, the goodwill is not considered impaired.  If the carrying value is higher than the fair value, there is an indication that impairment may exist and the second step is required.  In step two, the implied fair value of goodwill is calculated as the excess of the fair value of a reporting unit over the fair values assigned to its assets and liabilities.  If the implied fair value of goodwill is less than the carrying value of the reporting unit's goodwill, the difference is recognized as an impairment loss.
	We have amortizable and non-amortizable intangible assets consisting of patents, trademarks, lease-in-place intangible assets, developed technology, non-compete agreements and customer relationships.
	The following table summarizes our amortizable and non-amortizable intangible assets as of March 31, 2015 (in thousands):
			Gross		Accumulated		Net Carrying
			Carrying		Amortization		Amount
			Amount
	Patents and others		$	9,378	$	8,656	$	722
	Customer Relationships			11,300		1,128		10,172
	Technology			7,000		676		6,324
	Non-Compete			1,100		183		917
	Trademark			700		120		580
	Total Intangible assets at March 31, 2015		$	29,478	$	10,763	$	18,715
	We recorded amortization of intangible assets totaling approximately $855,000 and $49,000 for the three months ended March 31, 2015 and 2014, respectively, which is included in general and administrative expense in our accompanying consolidated statements of operations.
	As of March 31, 2015, the remaining weighted average amortization period for our amortizable intangible assets is approximately 6.2 years. Our estimated amortization expense for the next five years and thereafter is as follows (in thousands):
	Twelve Month Period Ending March 31,		Estimated Amortization Expense
	2016		$	2,931
	2017			2,897
	2018			2,895
	2019			2,611
	2020			2,460
	Thereafter			4,433

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2015
Income Taxes [Abstract]
Income Taxes	7	Income Taxes
	During the first quarter of 2015 our income tax benefit was approximately $1.1 million, which is primarily attributable to our first quarter pre-tax loss and deferred income taxes.  Our actual effective tax rate during the first quarter of 2015 differs from statutory federal rate as a result of several factors, including non-temporary differences and state and local income taxes.  During the first quarter of 2014 our income tax expense was approximately $172,000, which consisted of federal and state alternative minimum taxes.  Our effective income tax rate during the first quarter of 2014 differs from the statutory income tax rate primarily as a result of our use of net operating losses to offset current federal and state income taxes.  We evaluated the appropriateness of our deferred tax assets and related valuation allowance in accordance with ASC 740 based on all available positive and negative evidence.
	On June 10, 2014 we completed our acquisition of ShipStation.  On August 29, 2014 we completed our acquisition of ShipWorks.  Based on these discrete events, we re-evaluated our forecast of our projected taxable income.  As a result, we released a portion of our valuation allowance totaling approximately $3.6 million and $345,000 during the second and third quarter of 2014, respectively.  After analyzing our deferred tax assets including our remaining tax loss carry-forward and completing our forecast of future income taking into consideration potential synergy of the acquisitions, we believed we met the more likely than not threshold that we will be able to utilize our remaining tax loss carry-forward in the foreseeable future. As a result we released the remaining valuation allowance of approximately $9.6 million during the fourth quarter of 2014.  As of March 31, 2015 and December 31, 2014, we do not have any valuation allowance against our net deferred tax assets.

Fair_Value_Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2015
Fair Value Measurements [Abstract]
Fair Value Measurements	8	Fair Value Measurements
	Financial assets measured at fair value on a recurring basis are classified in one of the three following categories, which are described below:
	Level 1 - Valuations based on unadjusted quoted prices for identical assets in an active market
	Level 2 - Valuations based on quoted prices in markets where trading occurs infrequently or whose values are based on quoted prices of instruments with similar attributes in active markets
	Level 3 - Valuations based on inputs that are unobservable and involve management judgment and our own assumptions about market participants and pricing
	The following table summarizes our financial assets measured at fair value on a recurring basis (in thousands):
						Fair Value Measurement at Reporting Date Using
	Description		March 31,			Quoted Prices		Significant		Significant
			2015			in Active		Other		Unobservable
						Markets for		Observable		Inputs
						Identical Assets		Inputs		(Level 3)
						(Level 1)		(Level 2)
	Cash and cash equivalents		$	66,312		$	66,312	$	—	$	—
	Available-for-sale debt securities			15,110			—		15,110		—
	Total		$	81,422		$	66,312	$	15,110	$	—
						Fair Value Measurement at Reporting Date Using
	Description		December 31,			Quoted Prices		Significant		Significant
			2014			in Active		Other		Unobservable
						Markets for		Observable		Inputs
						Identical Assets		Inputs		(Level 3)
						(Level 1)		(Level 2)
	Cash and cash equivalents		$	40,933		$	40,933	$	—	$	—
	Available-for-sale debt securities			16,697			—		16,697		—
	Total		$	57,630		$	40,933	$	16,697	$	—
	The fair value of our available-for-sale debt securities included in the Level 2 category is based on the market values obtained from an independent pricing service that were evaluated using pricing models that vary by asset class and may incorporate available trade, bid and other market information and price quotes from well established independent pricing vendors and broker-dealers.
	As of March 31, 2015 we have approximately $26.5 million of contingent consideration relating to our acquisition of ShipStation that was required to be measured at fair value.  The fair value of the contingent consideration was determined based on a probability weighted method, which incorporates management’s forecasts of financial measures and the likelihood of the financial measure targets being achieved using a series of options that replicate the pay-off structure of the earn-out, and the value of each of these options was determined using the Black-Scholes-Merton option pricing framework.
	The following table summarizes our contingent consideration measured at fair value on a recurring basis (in thousands):
						Fair Value Measurement at Reporting Date Using
	Description		March 31,			Quoted Prices		Significant		Significant
			2015			in Active		Other		Unobservable
						Markets for		Observable		Inputs
						Identical Assets		Inputs		(Level 3)
						(Level 1)		(Level 2)
	Contingent consideration – current		$	26,487		$	—	$	—	$	26,487
	The following table represents a reconciliation of contingent consideration obligation measured on a recurring basis using significant unobservable inputs (level 3) as of March 31, 2015 (in thousands):
			31-Mar-15
	Beginning of year balance		$	25,015
	Contingent consideration distribution			(9,225	)
	Contingent consideration charges (1)			10,512
	Contingent consideration compensation expense (1)			185
	End of quarter balance		$	26,487
	-1	This amount represents fair value adjustment during the first quarter of 2015 to contingent consideration recorded associated with the acquisition of ShipStation.  The $10.5 million contingent consideration charge is recorded as a separate line item in our consolidated statement of income.  The $185,000 compensation expense for the adjustment of contingent consideration liability relating to certain employees is recorded in marketing and research and development in operating expense.

Cash_Equivalents_and_Investmen

Cash Equivalents and Investments	3 Months Ended
	Mar. 31, 2015
Cash Equivalents and Investments [Abstract]
Cash Equivalents and Investments	9	Cash Equivalents and Investments
	Our cash equivalents and investments consist of money market, U.S. government obligations, asset-backed securities and public corporate debt securities at March 31, 2015 and December 31, 2014. We consider all highly liquid investments with an original or remaining maturity of three months or less at the date of purchase to be cash equivalents. All of our investments are classified as available for sale and are recorded at market value using the specific identification method. Realized gains and losses are reflected in other income, net using the specific identification method.  There was no material realized gain or loss with respect to our investments during the first quarter of 2015. Unrealized gains and losses are included as a separate component of stockholders' equity.  We do not intend to sell investments with an amortized cost basis exceeding fair value and it is not likely that we will be required to sell the investments before recovery of their amortized cost bases. We have 6 securities with a total fair value of $2.7 million that have unrealized losses of approximately $7,000 as of March 31, 2015.
	On at least a quarterly basis, we evaluate our available for sale securities, and record an “other-than-temporary impairment” (“OTTI”) if we believe their fair value is less than historical cost and it is probable that we will not collect all contractual cash flows. We did not record any OTTI during the three months ended March 31, 2015, after evaluating a number of factors including, but not limited to:
		·	How much fair value has declined below amortized cost
		·	The financial condition of the issuers
		·	Significant rating agency changes on the issuer
		·	Our intent and ability to hold the security for a period of time sufficient to allow for any anticipated recovery in fair value
	The following table summarizes our cash, cash equivalents, restricted cash and investments as of March 31, 2015 and December 31, 2014 (in thousands):
			31-Mar-15
			Cost or		Gross		Gross			Estimated
			Amortized		Unrealized		Unrealized			Fair Value
			Cost		Gains		Losses
	Cash and cash equivalents:
	Cash		$	61,612		—		—		$	61,612
	Money market			4,700		—		—			4,700
	Cash and cash equivalents			66,312		—		—			66,312
	Short-term investments:
	Corporate notes and bonds			4,456		9		—			4,465
	U.S. government and agency securities			1,500		2		—			1,502
	Short-term investments			5,956		11		—			5,967
	Long-term investments:
	Corporate bonds and asset backed securities			9,085		65		(7	)		9,143
	Long-term investments			9,085		65		(7	)		9,143
	Cash, cash equivalents and investments		$	81,353		76		(7	)	$	81,422
			31-Dec-14
			Cost or		Gross		Gross			Estimated
			Amortized		Unrealized		Unrealized			Fair Value
			Cost		Gains		Losses
	Cash and cash equivalents:
	Cash		$	37,870		—		—		$	37,870
	Money market			3,063		—		—			3,063
	Cash and cash equivalents			40,933		—		—			40,933
	Short-term investments:
	Corporate bonds and asset backed securities			4,960		23		(1	)		4,982
	U.S. government and agency securities			1,498		2		—			1,500
	Short-term investments			6,458		25		(1	)		6,482
	Long-term investments:
	Corporate bonds and asset backed securities			10,178		46		(9	)		10,215
	Long-term investments			10,178		46		(9	)		10,215
	Cash, cash equivalents and investments		$	57,569		71		(10	)	$	57,630
	The following table summarizes contractual maturities of our marketable fixed-income securities as of March 31, 2015 (in thousands):
			Amortized		Estimated
			Cost		Fair Value
	Due within one year		$	5,956	$	5,967
	Due after one year through five years			9,057		9,102
	Due after five years through ten years			28		41
	Total		$	15,041	$	15,110

Summary_of_Significant_Account1

Summary of Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2015
Summary of Significant Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation
	We prepared the consolidated financial statements included herein pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with United States (“U.S.”) generally accepted accounting principles (“GAAP”) have been condensed or omitted pursuant to such rules and regulations. We believe that the disclosures are adequate to make the information presented not misleading. We recommend that these financial statements be read in conjunction with the audited financial statements and the notes thereto included in our latest annual report on Form 10-K for the fiscal year ended December 31, 2014, filed with the SEC on March 16, 2015.
	In our opinion, these unaudited financial statements contain all adjustments (consisting of normal recurring adjustments) necessary to present fairly our financial position as of March 31, 2015, our results of operations for the three months ended March 31, 2015 and our cash flows for the three months ended March 31, 2015.  The results of operations for the interim periods are not necessarily indicative of the results that may be expected for the year ending December 31, 2015.
Principles of Consolidation	Principles of Consolidation
	The consolidated financial statements include the accounts of Stamps.com Inc., Auctane LLC, Interapptive, Inc. and PhotoStamps Inc.  In June 2014, we completed our acquisition of 100% of the outstanding equity of Auctane LLC, the Texas limited liability company that operates ShipStation (“Auctane LLC” or “ShipStation”) in a cash and contingent stock transaction.  ShipStation, based in Austin, Texas, offers monthly subscription based e-commerce shipping software primarily under the brand ShipStation and Auctane.  In August 2014, we completed our acquisition of 100% of the outstanding equity of Interapptive, Inc., the Missouri corporation that operates ShipWorks (“Interapptive, Inc.” or “ShipWorks”) in a cash transaction.  ShipWorks, based in St Louis, Missouri, offers monthly subscription based e-commerce shipping software.
	Because 100% of the voting control of Auctane LLC and Interapptive, Inc. is held by us, we have consolidated ShipStation and ShipWorks from the date we obtained control in the accompanying consolidated financial statements. Similarly, due to our 100% control, PhotoStamps Inc. is also consolidated in the accompanying consolidated financial statements from the date of its inception. All significant intercompany accounts and transactions have been eliminated.
Use of Estimates and Risk Management	Use of Estimates and Risk Management
	The preparation of financial statements in conformity with U.S. GAAP requires us to make estimates and assumptions that affect the amounts reported in the financial statements and the accompanying notes.  Actual results could differ from those estimates, and such differences may be material to the financial statements. Examples include estimates of loss contingencies, promotional coupon redemptions, the number of PhotoStamps retail boxes that will not be redeemed, deferred income taxes, the estimates and assumptions used to calculate the allocation of the purchase price related to our acquisitions, including related contingent consideration, and estimates regarding the useful lives of our building, patents and other amortizable intangible assets.
Fair Value of Financial Instruments	Fair Value of Financial Instruments
	Carrying amounts of certain of our financial instruments, including cash, cash equivalents, accounts receivable and accounts payable, approximate fair value due to their short maturities. The fair values of investments are determined using quoted market prices for those securities or similar financial instruments.
	Certain contingent consideration may be payable by us in connection with our acquisition of ShipStation. The fair value of the contingent consideration is determined using valuation techniques that replicate the pay-off structure of the earn-out provision in the ShipStation transaction, and the value of each of these options was determined using the Black-Scholes-Merton option pricing framework.  During the first quarter of 2015 we incurred approximately $10.7 million of charges relating to our contingent consideration liability of which $10.5 million was recorded in contingent consideration charges and $185,000 was recorded in marketing and research and development in operating expenses.  Contingent consideration liability was approximately $26.5 million as of March 31, 2015.
Property and Equipment	Property and Equipment
	We account for property and equipment at cost less accumulated depreciation and amortization. We compute depreciation using the straight-line method over the estimated useful life of the asset, generally three to five years for furniture, fixtures and equipment and ten to forty years for building and building improvements. We have a policy of capitalizing expenditures that materially increase assets’ useful lives and charging ordinary maintenance and repairs to operations as incurred. When property or equipment is disposed of, the cost and related accumulated depreciation and amortization are removed, and any gain or loss is included in operations.
Goodwill	Goodwill
	Goodwill represents the excess of the fair value of consideration given over the fair value of the tangible assets, identifiable intangible assets and liabilities assumed in a business combination.  We are required to test goodwill for impairment annually and whenever events or circumstances indicate the fair value of a reporting unit may be below its carrying value. Goodwill will be reviewed for impairment annually on October 1 utilizing a qualitative assessment or a two-step process.
Trademarks, Patents and Intangible Assets	Trademarks, Patents and Intangible Assets
	Acquired trademarks, patents and other intangibles include both amortizable and non-amortizable assets and are included in intangible assets, net in the accompanying consolidated balance sheets. Intangible assets are carried at cost less accumulated amortization. Cost associated with internally developed intangible assets is typically expensed as incurred as research and development costs.  Amortization of amortizable intangible assets is calculated on a straight-line basis over the estimated useful lives of the assets, ranging from approximately 4 to 17 years.
Impairment of Long-Lived Assets and Intangible Assets	Impairment of Long-Lived Assets and Intangible Assets
	Long-lived assets including intangible assets with definitive useful lives are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset to future net cash flows expected to be generated by the asset.  If such assets are considered to be impaired, the impairment to be recognized is measured by the amount by which the carrying amount of the assets exceeds the fair value of the assets.  Assets to be disposed of are reported at the lower of the carrying amount or fair value less costs to sell.
	Intangible assets that have indefinite useful lives are not amortized but, instead, tested at least annually for impairment while intangible assets that have finite useful lives continue to be amortized over their respective useful lives.  Intangible assets with finite lives are reviewed for impairment when events and circumstances indicate that the intangible asset might be impaired.
	Intangible assets are tested for impairment, when required, using a two-step process.  The first step is to determine the fair value of the reporting unit, which may be calculated using a discounted cash flow methodology, and compare this value to its carrying value.  If the fair value exceeds the carrying value, no further work is required, and no impairment loss would be recognized.  If the fair value is less than the carrying value, the second step is performed. The second step is an allocation of the fair value of the reporting unit to all of the reporting unit's assets and liabilities under a hypothetical purchase price allocation.  Based on the ongoing evaluations performed by us, there was no impairment of intangible assets during the year ended December 31, 2014.
Income Taxes	Income Taxes
	We account for income taxes in accordance with Financial Accounting Standards Board (“FASB”) ASC Topic No. 740, Income Taxes (“ASC 740”), which requires that deferred tax assets and liabilities be recognized using enacted tax rates for the effect of temporary differences between the book and tax basis of recorded assets and liabilities. ASC 740 also requires that deferred tax assets be reduced by a valuation allowance if it is more likely than not that some or all of the net deferred tax assets will not be realized. We record a valuation allowance to reduce our gross deferred tax assets, which are primarily comprised of U.S. Federal and State tax loss carry-forwards, to the amount that is more likely than not (a likelihood of more than 50 percent) to be realized.  In order for us to realize our deferred tax assets, we must be able to generate sufficient taxable income. We evaluate the appropriateness of our deferred tax assets and related valuation allowance in accordance with ASC 740 based on all available positive and negative evidence. As of March 31, 2015 and December 31, 2014 we do not have any valuation allowance recorded to reduce our gross deferred tax assets as we believe we have met the more likely than not threshold we will realize our tax loss carry-forwards in the foreseeable future.
Deferred Revenue	Deferred Revenue
	Our deferred revenue relates to service revenue and PhotoStamps retail boxes.  Deferred revenue related to our service revenue generally arises due to the timing of payment versus the provision of services for certain customers billed in advance.  We sell our PhotoStamps retail boxes to our customers through our website and selected third parties.  Proceeds from the sale of our PhotoStamps retail boxes are initially recorded as a liability when received. We record the liability for outstanding PhotoStamps retail boxes in deferred revenue.
Revenue Recognition	Revenue Recognition
	We recognize revenue from product sales or services rendered, as well as commissions from advertising or sale of products by third party vendors to our customer base when the following four revenue recognition criteria are met: persuasive evidence of an arrangement exists, delivery has occurred or services have been rendered, the selling price is fixed or determinable, and collectability is reasonably assured.
	Service revenue is primarily derived from monthly subscription and transaction fees and is recognized in the period that services are provided. Product sales, net of return allowances, are recorded when the products are shipped and title passes to customers. Sales of items, including PhotoStamps, sold to customers are made pursuant to a sales contract that provides for transfer of both title and risk of loss upon our delivery to the carrier. Return allowances for expected product returns, which reduce product revenue, are estimated using historical experience. Commissions from the advertising or sale of products by a third party vendor to our customer base are recognized when the revenue is earned and collection is deemed probable.
	Customers typically pay face value for postage purchased for use through our mailing and shipping software, and the funds are transferred directly from the customers to the United States Postal Services (“USPS”). We do not recognize revenue for this postage, as it is purchased by our customers directly from the USPS.
	PhotoStamps revenue, which includes the face value of postage, from the sale of PhotoStamps sheets and rolls is made pursuant to a sales contract that provides for transfer of both title and risk of loss upon our delivery to the carrier.
	Sale of PhotoStamps retail boxes are initially recorded as deferred revenue.  PhotoStamps revenue related to the sale of these PhotoStamps retail boxes is subsequently recognized when either: 1) the PhotoStamps retail box is redeemed, or 2) the likelihood of the PhotoStamps retail box being redeemed is deemed remote (“breakage”) and there is no legal obligation to remit the value of the unredeemed PhotoStamps retail boxes.
	On a limited basis, we allow third parties to offer products and promotions to our customer base. These arrangements generally provide payment in the form of a flat fee or revenue sharing arrangements where we receive payment upon customers accessing third party products and services. During the first quarter of 2015 and 2014 revenue from such advertising arrangements was not significant.
	We provide our customers with the opportunity to purchase parcel insurance directly through our solutions. Insurance revenue represents the gross amount charged to the customer for purchasing insurance and the related cost represents the amount paid to our insurance brokers. We recognize revenue on insurance purchases upon the ship date of the insured package.
PhotoStamps Retail Boxes	PhotoStamps Retail Boxes
	We sell PhotoStamps retail boxes that are redeemable for PhotoStamps on our website.  The PhotoStamps retail boxes are sold through various third party retail partners.  Our PhotoStamps retail boxes are not subject to administrative fees on unredeemed boxes and have no expiration date.  PhotoStamps retail box sales are recorded as deferred revenue.  We concluded that sufficient company-specific historical evidence existed to determine the period of time after which the likelihood of the PhotoStamps retail boxes being redeemed was remote.  Based on our analysis of the redemption data, we estimate that period of time to be 60 months after the sale of our PhotoStamps retail boxes.
	We recognize breakage revenue related to our PhotoStamps retail boxes utilizing the redemption recognition method. Under the redemption recognition method, we recognize breakage revenue from unredeemed retail boxes in proportion to the revenue recognized from the retail boxes that have been redeemed.  Revenue from our PhotoStamps retail boxes is included in PhotoStamps revenue. During first quarter of 2015 and 2014 PhotoStamps retail box breakage revenue was not significant.
Short-term financing obligation	Short- term financing obligation
	We utilize short-term financing to fund certain company operation.  We have $3.1 million in short-term financing obligations, which is included in accounts payable and accrued expenses and $3.9 million of unused credit, as of March 31, 2015.
Subsequent Events	Subsequent Events
	We are not aware of any material subsequent events or transactions that have occurred that would require recognition in the financial statements or disclosure in the notes to the consolidated financial statements.

Commitments_and_Contingencies_

Commitments and Contingencies (Tables)	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies [Abstract]
Future Minimum Lease Payment Under Operating Leases	The following table is a schedule of our significant contractual obligations and commercial commitments, which consist only of future minimum lease payments under operating leases as of March 31, 2015 (in thousands):
	Twelve Month Period Ending March 31,	Operating
		Lease Obligations
	2016	$	437
	2017		262
	2018		267
	2019		204
	Thereafter		—

Net_Loss_Income_per_Share_Tabl

Net (Loss) Income per Share (Tables)	3 Months Ended
	Mar. 31, 2015
Net (Loss) Income per Share [Abstract]
Calculation of basic and diluted net (loss) income per share	The following table reconciles share amounts utilized to calculate basic and diluted net (loss) income per share (in thousands, except per share data):
		Three Months Ended
		March 31,
		2015			2014
	Net (loss) income	$	(970	)	$	7,334
	Basic - weighted average common shares		16,156			16,222
	Diluted effect of common stock equivalents		—	(1)		442
	Diluted - weighted average common shares		16,156			16,664
	(Loss) earnings per share:
	Basic	$	(0.06	)	$	0.45
	Diluted	$	(0.06	)	$	0.44
Anti-dilutive securities excluded from computation of earnings per share	The calculation of dilutive shares excludes the effect of the following options that are considered anti-dilutive (in thousands):
		Three Months Ended
		March 31,
		2015			2014
	Anti-dilutive stock option shares		3,006			109

StockBased_Employee_Compensati1

Stock-Based Employee Compensation (Tables)	3 Months Ended
	Mar. 31, 2015
Stock-Based Employee Compensation [Abstract]
Stock-based compensation expense	The following table sets forth the stock-based compensation expense that we recognized for the periods indicated (in thousands):
		Three Months Ended
		March 31,
		2015			2014
	Stock-based compensation expense relating to:
	Employee and director stock options	$	2,528		$	900
	Employee stock purchases		114			116
	Total stock-based compensation expense	$	2,642		$	1,016
	Stock-based compensation expense relating to:
	Cost of revenues	$	167		$	101
	Sales and marketing		722			193
	Research and development		548			236
	General and administrative		1,205			486
	Total stock-based compensation expense	$	2,642		$	1,016
Weighted average assumptions used in Black-Scholes valuation model	The following are the weighted average assumptions used in the Black-Scholes valuation model for the periods indicated:
		Three Months Ended
		March 31,
		2015			2014
	Expected dividend yield		—			—
	Risk-free interest rate		1	%		0.7	%
	Expected volatility		46.14	%		49.7	%
	Expected life (in years)		3.4			3.6
	Expected forfeiture rate		6	%		6	%

Goodwill_and_Intangible_Assets1

Goodwill and Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets [Abstract]
Schedule of acquired intangible assets	The following table summarizes our amortizable and non-amortizable intangible assets as of March 31, 2015 (in thousands):
		Gross		Accumulated		Net Carrying
		Carrying		Amortization		Amount
		Amount
	Patents and others	$	9,378	$	8,656	$	722
	Customer Relationships		11,300		1,128		10,172
	Technology		7,000		676		6,324
	Non-Compete		1,100		183		917
	Trademark		700		120		580
	Total Intangible assets at March 31, 2015	$	29,478	$	10,763	$	18,715
Schedule of future amortization expense	Our estimated amortization expense for the next five years and thereafter is as follows (in thousands):
	Twelve Month Period Ending March 31,	Estimated Amortization Expense
	2016	$	2,931
	2017		2,897
	2018		2,895
	2019		2,611
	2020		2,460
	Thereafter		4,433

Fair_Value_Measurements_Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Measurements [Abstract]
Financial assets measured at fair value on a recurring basis	The following table summarizes our financial assets measured at fair value on a recurring basis (in thousands):
						Fair Value Measurement at Reporting Date Using
	Description		March 31,			Quoted Prices		Significant		Significant
			2015			in Active		Other		Unobservable
						Markets for		Observable		Inputs
						Identical Assets		Inputs		(Level 3)
						(Level 1)		(Level 2)
	Cash and cash equivalents		$	66,312		$	66,312	$	—	$	—
	Available-for-sale debt securities			15,110			—		15,110		—
	Total		$	81,422		$	66,312	$	15,110	$	—
						Fair Value Measurement at Reporting Date Using
	Description		December 31,			Quoted Prices		Significant		Significant
			2014			in Active		Other		Unobservable
						Markets for		Observable		Inputs
						Identical Assets		Inputs		(Level 3)
						(Level 1)		(Level 2)
	Cash and cash equivalents		$	40,933		$	40,933	$	—	$	—
	Available-for-sale debt securities			16,697			—		16,697		—
	Total		$	57,630		$	40,933	$	16,697	$	—
Contingent consideration measured at fair value on a recurring basis	The following table summarizes our contingent consideration measured at fair value on a recurring basis (in thousands):
						Fair Value Measurement at Reporting Date Using
	Description		March 31,			Quoted Prices		Significant		Significant
			2015			in Active		Other		Unobservable
						Markets for		Observable		Inputs
						Identical Assets		Inputs		(Level 3)
						(Level 1)		(Level 2)
	Contingent consideration – current		$	26,487		$	—	$	—	$	26,487
Reconciliation of contingent consideration obligation	The following table represents a reconciliation of contingent consideration obligation measured on a recurring basis using significant unobservable inputs (level 3) as of March 31, 2015 (in thousands):
			31-Mar-15
	Beginning of year balance		$	25,015
	Contingent consideration distribution			(9,225	)
	Contingent consideration charges (1)			10,512
	Contingent consideration compensation expense (1)			185
	End of quarter balance		$	26,487
	-1	This amount represents fair value adjustment during the first quarter of 2015 to contingent consideration recorded associated with the acquisition of ShipStation.  The $10.5 million contingent consideration charge is recorded as a separate line item in our consolidated statement of income.  The $185,000 compensation expense for the adjustment of contingent consideration liability relating to certain employees is recorded in marketing and research and development in operating expense.

Cash_Equivalents_and_Investmen1

Cash Equivalents and Investments (Tables)	3 Months Ended
	Mar. 31, 2015
Cash Equivalents and Investments [Abstract]
Cash, cash equivalents, restricted cash and investments	The following table summarizes our cash, cash equivalents, restricted cash and investments as of March 31, 2015 and December 31, 2014 (in thousands):
		31-Mar-15
		Cost or		Gross		Gross			Estimated
		Amortized		Unrealized		Unrealized			Fair Value
		Cost		Gains		Losses
	Cash and cash equivalents:
	Cash	$	61,612		—		—		$	61,612
	Money market		4,700		—		—			4,700
	Cash and cash equivalents		66,312		—		—			66,312
	Short-term investments:
	Corporate notes and bonds		4,456		9		—			4,465
	U.S. government and agency securities		1,500		2		—			1,502
	Short-term investments		5,956		11		—			5,967
	Long-term investments:
	Corporate bonds and asset backed securities		9,085		65		(7	)		9,143
	Long-term investments		9,085		65		(7	)		9,143
	Cash, cash equivalents and investments	$	81,353		76		(7	)	$	81,422
		31-Dec-14
		Cost or		Gross		Gross			Estimated
		Amortized		Unrealized		Unrealized			Fair Value
		Cost		Gains		Losses
	Cash and cash equivalents:
	Cash	$	37,870		—		—		$	37,870
	Money market		3,063		—		—			3,063
	Cash and cash equivalents		40,933		—		—			40,933
	Short-term investments:
	Corporate bonds and asset backed securities		4,960		23		(1	)		4,982
	U.S. government and agency securities		1,498		2		—			1,500
	Short-term investments		6,458		25		(1	)		6,482
	Long-term investments:
	Corporate bonds and asset backed securities		10,178		46		(9	)		10,215
	Long-term investments		10,178		46		(9	)		10,215
	Cash, cash equivalents and investments	$	57,569		71		(10	)	$	57,630
Contractual maturities of marketable fixed-income securities	The following table summarizes contractual maturities of our marketable fixed-income securities as of March 31, 2015 (in thousands):
		Amortized		Estimated
		Cost		Fair Value
	Due within one year	$	5,956	$	5,967
	Due after one year through five years		9,057		9,102
	Due after five years through ten years		28		41
	Total	$	15,041	$	15,110

Summary_of_Significant_Account2

Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Jun. 10, 2014	Aug. 29, 2014
Principles of Consolidation [Abstract]
Percentage of voting control in Auctane LLC (in hundredths)	100.00%
Contingent Consideration [Abstract]
Charges relating to contingent consideration liability	$10,700,000
Contingent consideration charges	10,512,000	0
Marketing, research and development expenses	185,000
Contingent consideration liability	$26,500,000
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	4 years
Minimum [Member] | Furniture, Fixtures and Equipment [Member]
Property and Equipment [Abstract]
Estimated useful life	3 years
Minimum [Member] | Building and Building Improvements [Member]
Property and Equipment [Abstract]
Estimated useful life	10 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	17 years
Maximum [Member] | Furniture, Fixtures and Equipment [Member]
Property and Equipment [Abstract]
Estimated useful life	5 years
Maximum [Member] | Building and Building Improvements [Member]
Property and Equipment [Abstract]
Estimated useful life	40 years
ShipStation [Member]
Principles of Consolidation [Abstract]
Percentage of outstanding equity in Auctane LLC purchased (in hundredths)			100.00%
ShipWorks [Member]
Principles of Consolidation [Abstract]
Percentage of outstanding equity in Auctane LLC purchased (in hundredths)				100.00%

Summary_of_Significant_Account3

Summary of Significant Accounting Policies, Part II (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014
	Criteria
Income Taxes [Abstract]
Percentage of realization of deferred tax assets, minimum (in hundredths)	50.00%
Revenue Recognition [Abstract]
Number of criteria to be met for recognition of revenue	4
PhotoStamps Retail Boxes [Abstract]
Period of redemption of PhotoStamps retail boxes	60 months
Short-term Borrowing [Abstract]
Accounts payable and accrued expenses	$30,613,000	$22,521,000
Unused credits	$3,900,000

Acquisition_Details

Acquisition (Details) (Endicia [Member], USD $)	3 Months Ended
	Mar. 31, 2015
Business Acquisition [Line Items]
Business acquisition	$215,000,000
Period in which Agreement can be terminated	6 months
Period of automatic extension of Agreement	18 months
Reduced period in which Agreement can be terminated	12 months
Termination fees for Stock Purchase Agreement	10,750,000
Term Loan Facility [Member]
Business Acquisition [Line Items]
Aggregate principal amount	82,500,000
Revolving Credit Facility [Member]
Business Acquisition [Line Items]
Aggregate principal amount	$82,500,000

Commitments_and_Contingencies_1

Commitments and Contingencies (Details) (USD $)	Mar. 31, 2015
In Thousands, unless otherwise specified
Future minimum lease payment under operating leases [Abstract]
2016	$437
2017	262
2018	267
2019	204
Thereafter	$0

Net_Loss_Income_per_Share_Deta

Net (Loss) Income per Share (Details) (USD $)	3 Months Ended
In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014
Computation of basic and diluted net income per share [Abstract]
Net (loss) income	($970)		$7,334
Basic - weighted average common shares (in shares)	16,156		16,222
Diluted effect of common stock equivalents (in shares)	0	[1]	442
Diluted - weighted average common shares (in shares)	16,156	[1]	16,664
(Loss) earnings per share [Abstract]
Basic (in dollars per share)	($0.06)		$0.45
Diluted (in dollars per share)	($0.06)		$0.44
Stock Options [Member]
Anti-dilutive shares excluded from computation of diluted shares [Abstract]
Anti-dilutive stock option shares (in shares)	3,006		109
[1]	Common equivalent shares are excluded from the diluted earnings per share calculation as their effect is anti-dilutive.

StockBased_Employee_Compensati2

Stock-Based Employee Compensation (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$2,642	$1,016
Weighted average assumptions used in Black-Scholes valuation model [Abstract]
Expected dividend yield (in hundredths)	0.00%	0.00%
Risk-free interest rate (in hundredths)	1.00%	0.70%
Expected volatility (in hundredths)	46.14%	49.70%
Expected life	3 years 4 months 24 days	3 years 7 months 6 days
Expected forfeiture rate (in hundredths)	6.00%	6.00%
Employee and director stock options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	2,528	900
Employee stock purchases [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	114	116
Cost of revenues [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	167	101
Sales and marketing [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	722	193
Research and development [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	548	236
General and administrative [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Total stock-based compensation expense	$1,205	$486
Maximum [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Vesting period	5 years

Goodwill_and_Intangible_Assets2

Goodwill and Intangible Assets (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Intangible Assets [Abstract]
Gross Carrying Amount	$29,478,000
Accumulated Amortization	10,763,000
Net Carrying Amount	18,715,000
Goodwill	66,893,000		66,893,000
Amortization of intangible assets	855,000	49,000
Identifiable intangible assets, weighted average remaining useful life	6 years 2 months 12 days
Amortization Expense, Fiscal Year Maturity [Abstract]
2016	2,931,000
2017	2,897,000
2018	2,895,000
2019	2,611,000
2020	2,460,000
Thereafter	4,433,000
Patents and Others [Member]
Intangible Assets [Abstract]
Gross Carrying Amount	9,378,000
Accumulated Amortization	8,656,000
Net Carrying Amount	722,000
Customer Relationships [Member]
Intangible Assets [Abstract]
Gross Carrying Amount	11,300,000
Accumulated Amortization	1,128,000
Net Carrying Amount	10,172,000
Technology [Member]
Intangible Assets [Abstract]
Gross Carrying Amount	7,000,000
Accumulated Amortization	676,000
Net Carrying Amount	6,324,000
Non-Compete [Member]
Intangible Assets [Abstract]
Gross Carrying Amount	1,100,000
Accumulated Amortization	183,000
Net Carrying Amount	917,000
Trademark [Member]
Intangible Assets [Abstract]
Gross Carrying Amount	700,000
Accumulated Amortization	120,000
Net Carrying Amount	$580,000

Income_Taxes_Details

Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014
Income Taxes [Abstract]
Income tax benefit due to release of valuation allowance		$9,600,000	$345,000	$3,600,000
Total net income tax expense for corporate alternative minimum federal and state taxes					172,000
Total net tax benefit	($1,120,000)

Fair_Value_Measurements_Detail

Fair Value Measurements (Details) (USD $)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015		Mar. 31, 2014	Dec. 31, 2014
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent consideration beginning of the period	$25,015
Contingent consideration distribution	-9,225
Contingent consideration charges (1)	10,512		0
Contingent consideration compensation expense (1)	185	[1]
Contingent consideration beginning of the period	26,487
Financial assets measured at fair value on a recurring basis [Abstract]
Available-for-sale debt securities	15,110
Contingent consideration measured at fair value on a recurring basis [Abstract]
Contingent consideration - current	26,487			9,225
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent consideration beginning of the period	25,015
Contingent consideration distribution	-9,225
Contingent consideration charges (1)	10,512		0
Contingent consideration compensation expense (1)	185	[1]
Contingent consideration beginning of the period	26,487
Recurring [Member]
Financial assets measured at fair value on a recurring basis [Abstract]
Cash equivalents	66,312			40,933
Available-for-sale debt securities	15,110			16,697
Total	81,422			57,630
Contingent consideration measured at fair value on a recurring basis [Abstract]
Contingent consideration - current	26,487
Recurring [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Financial assets measured at fair value on a recurring basis [Abstract]
Cash equivalents	66,312			40,933
Available-for-sale debt securities	0			0
Total	66,312			40,933
Contingent consideration measured at fair value on a recurring basis [Abstract]
Contingent consideration - current	0
Recurring [Member] | Significant Other Observable Inputs (Level 2) [Member]
Financial assets measured at fair value on a recurring basis [Abstract]
Cash equivalents	0			0
Available-for-sale debt securities	15,110			16,697
Total	15,110			16,697
Contingent consideration measured at fair value on a recurring basis [Abstract]
Contingent consideration - current	0
Recurring [Member] | Significant Unobservable Inputs (Level 3) [Member]
Financial assets measured at fair value on a recurring basis [Abstract]
Cash equivalents	0			0
Available-for-sale debt securities	0			0
Total	0			0
Contingent consideration measured at fair value on a recurring basis [Abstract]
Contingent consideration - current	$26,487
[1]	This amount represents fair value adjustment during the first quarter of 2015 to contingent consideration recorded associated with the acquisition of ShipStation. The $10.5 million contingent consideration charge is recorded as a separate line item in our consolidated statement of income. The $185,000 compensation expense for the adjustment of contingent consideration liability relating to certain employees is recorded in marketing and research and development in operating expense.

Cash_Equivalents_and_Investmen2

Cash Equivalents and Investments (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
	Security
Cash Equivalents and Investments [Abstract]
Number of securities held	6
Fair value of securities	$2,700,000
Unrealized losses on security held	7,000
Cash and cash equivalents [Abstract]
Cost or amortized cost	66,312,000	40,933,000	83,248,000	66,674,000
Contractual maturities of marketable fixed-income securities [Abstract]
Due within one year, amortized cost	5,956,000
Due after one year through five years, amortized cost	9,057,000
Due after five year through ten years, amortized cost	28,000
Total, Amortized Cost	15,041,000
Due within one year, estimated fair value	5,967,000
Due after one year through five years, estimated fair value	9,102,000
Due after five year through ten years, estimated fair value	41,000
Total, Estimated Fair Value	15,110,000
Cash and cash equivalents [Member]
Cash and cash equivalents [Abstract]
Cost or amortized cost	66,312,000	40,933,000
Gross unrealized gains	0	0
Gross unrealized Losses	0	0
Estimated fair value	66,312,000	40,933,000
Short-term investments [Member]
Cash and cash equivalents [Abstract]
Cost or amortized cost	5,956,000	6,458,000
Gross unrealized gains	11,000	25,000
Gross unrealized Losses	0	-1,000
Estimated fair value	5,967,000	6,482,000
Long-term investments [Member]
Cash and cash equivalents [Abstract]
Cost or amortized cost	9,085,000	10,178,000
Gross unrealized gains	65,000	46,000
Gross unrealized Losses	-7,000	-9,000
Estimated fair value	9,143,000	10,215,000
Cash, cash equivalents and investments [Member]
Cash and cash equivalents [Abstract]
Cost or amortized cost	81,353,000	57,569,000
Gross unrealized gains	76,000	71,000
Gross unrealized Losses	-7,000	-10,000
Estimated fair value	81,422,000	57,630,000
Cash [Member] | Cash and cash equivalents [Member]
Cash and cash equivalents [Abstract]
Cost or amortized cost	61,612,000	37,870,000
Gross unrealized gains	0	0
Gross unrealized Losses	0	0
Estimated fair value	61,612,000	37,870,000
Money market [Member] | Cash and cash equivalents [Member]
Cash and cash equivalents [Abstract]
Cost or amortized cost	4,700,000	3,063,000
Gross unrealized gains	0	0
Gross unrealized Losses	0	0
Estimated fair value	4,700,000	3,063,000
Corporate bonds and asset backed securities [Member] | Short-term investments [Member]
Cash and cash equivalents [Abstract]
Cost or amortized cost		4,960,000
Gross unrealized gains		23,000
Gross unrealized Losses		-1,000
Estimated fair value		4,982,000
Corporate bonds and asset backed securities [Member] | Short-term investments [Member]
Cash and cash equivalents [Abstract]
Cost or amortized cost	4,456,000
Gross unrealized gains	9,000
Gross unrealized Losses	0
Estimated fair value	4,465,000
Corporate bonds and asset backed securities [Member] | Long-term investments [Member]
Cash and cash equivalents [Abstract]
Cost or amortized cost	9,085,000	10,178,000
Gross unrealized gains	65,000	46,000
Gross unrealized Losses	-7,000	-9,000
Estimated fair value	9,143,000	10,215,000
U.S. government and agency securities [Member] | Short-term investments [Member]
Cash and cash equivalents [Abstract]
Cost or amortized cost	1,500,000	1,498,000
Gross unrealized gains	2,000	2,000
Gross unrealized Losses	0	0
Estimated fair value	$1,502,000	$1,500,000