[Line Items] for Accounting Policies [Table]

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- Definition

Number Of Offices

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Share held by related party.

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- Definition

Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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-Publisher FASB
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-Section 50
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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount, after allocation of valuation allowances and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, with jurisdictional netting.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards classified as current.

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Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2017 USD ($) office	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Mar. 31, 2017 USD ($)
Accounting Policies
Advertising expense	$ 8,600,000	$ 10,400,000	$ 13,700,000
Total foreign currency transaction gain (loss)	354,000	315,000	(480,000)
Impairment of software	0	0	0
Reclassification of deferred tax assets to noncurrent	0	793,000
Increase to deferred tax assets noncurrent from reclassification	$ 1,516,000
Minimum
Accounting Policies
Number of offices \| office	25
Computer hardware and software \| Minimum
Accounting Policies
Estimated useful lives (in years)	3 years
Computer hardware and software \| Maximum
Accounting Policies
Estimated useful lives (in years)	5 years
Capitalized internal-use software and website development \| Minimum
Accounting Policies
Estimated useful lives (in years)	3 years
Capitalized internal-use software and website development \| Maximum
Accounting Policies
Estimated useful lives (in years)	5 years
Office equipment and office furniture \| Minimum
Accounting Policies
Estimated useful lives (in years)	3 years
Office equipment and office furniture \| Maximum
Accounting Policies
Estimated useful lives (in years)	5 years
Azzurro Capital, Inc.
Accounting Policies
Percent of outstanding shares	57.80%
Other Income (Loss)
Accounting Policies
Total foreign currency transaction gain (loss)	$ 158,000	$ (211,000)	$ (1,100,000)
Customer One \| Accounts Receivable \| Credit Concentration Risk
Accounting Policies
Concentration risk (percentage)		16.00%
Accounting Standards Update 2015-07
Accounting Policies
Reclassification of deferred tax assets to noncurrent				$ (793,000)
Increase to deferred tax assets noncurrent from reclassification				$ 793,000