Summary of Significant Accounting Policies - Impact of Adoption of New Revenue Standard on the Condensed Consolidated Balance Sheet and Statement of Operations (Details) - USD ($)
$ / shares in Units, $ in Thousands |
3 Months Ended |
|
|
Mar. 31, 2018 |
Mar. 31, 2017 |
Jan. 01, 2018 |
Dec. 31, 2017 |
| Assets |
|
|
|
|
| Prepaid expenses and other current assets |
$ 5,253
|
|
$ 5,694
|
$ 4,546
|
| Other assets |
3,806
|
|
3,054
|
1,238
|
| Equity |
|
|
|
|
| Accumulated deficit |
(59,963)
|
|
(64,283)
|
(67,247)
|
| Costs and operating expenses: |
|
|
|
|
| Cost of revenue (exclusive of depreciation and amortization) |
16,613
|
$ 12,993
|
|
|
| Sales and marketing |
7,405
|
7,107
|
|
|
| Total costs and operating expenses |
38,167
|
31,529
|
|
|
| Income from operations |
4,173
|
597
|
|
|
| Income before provision for income taxes |
4,346
|
671
|
|
|
| Net income |
$ 4,320
|
$ 660
|
|
|
| Net income per common share: |
|
|
|
|
| Net income per share, basic (usd per share) |
$ 0.13
|
$ 0.02
|
|
|
| Net income per share, diluted (usd per share) |
$ 0.12
|
$ 0.02
|
|
|
| Calculated under Revenue Guidance in Effect before Topic 606 |
|
|
|
|
| Assets |
|
|
|
|
| Prepaid expenses and other current assets |
$ 3,556
|
|
|
4,546
|
| Other assets |
1,209
|
|
|
1,238
|
| Equity |
|
|
|
|
| Accumulated deficit |
(64,257)
|
|
|
$ (67,247)
|
| Costs and operating expenses: |
|
|
|
|
| Cost of revenue (exclusive of depreciation and amortization) |
16,673
|
|
|
|
| Sales and marketing |
8,675
|
|
|
|
| Total costs and operating expenses |
39,497
|
|
|
|
| Income from operations |
2,843
|
|
|
|
| Income before provision for income taxes |
3,016
|
|
|
|
| Net income |
$ 2,990
|
|
|
|
| Net income per common share: |
|
|
|
|
| Net income per share, basic (usd per share) |
$ 0.09
|
|
|
|
| Net income per share, diluted (usd per share) |
$ 0.08
|
|
|
|
| Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09 |
|
|
|
|
| Assets |
|
|
|
|
| Prepaid expenses and other current assets |
$ 1,697
|
|
1,148
|
|
| Other assets |
2,597
|
|
1,816
|
|
| Equity |
|
|
|
|
| Accumulated deficit |
4,294
|
|
$ 2,964
|
|
| Costs and operating expenses: |
|
|
|
|
| Cost of revenue (exclusive of depreciation and amortization) |
(60)
|
|
|
|
| Sales and marketing |
(1,270)
|
|
|
|
| Total costs and operating expenses |
(1,330)
|
|
|
|
| Income from operations |
1,330
|
|
|
|
| Income before provision for income taxes |
1,330
|
|
|
|
| Net income |
$ 1,330
|
|
|
|
| Net income per common share: |
|
|
|
|
| Net income per share, basic (usd per share) |
$ 0.04
|
|
|
|
| Net income per share, diluted (usd per share) |
$ 0.04
|
|
|
|