Revenue Recognition (ASC 606 Adoption) (Details) - USD ($)
$ / shares in Units, $ in Thousands |
3 Months Ended |
6 Months Ended |
|
Jun. 30, 2018 |
Jun. 30, 2017 |
Jun. 30, 2018 |
Jun. 30, 2017 |
Dec. 31, 2017 |
| Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |
|
|
|
|
|
| Revenue |
$ 69,228
|
$ 61,252
|
$ 128,377
|
$ 111,460
|
|
| Income tax expense (benefit) |
161
|
242
|
45
|
(2,544)
|
|
| Net income |
$ 6,640
|
$ 3,741
|
$ 7,606
|
$ 4,562
|
|
| Basic earnings per share (in dollars per share) |
$ 0.25
|
$ 0.15
|
$ 0.29
|
$ 0.19
|
|
| Diluted earnings per share (in dollars per share) |
$ 0.24
|
$ 0.14
|
$ 0.28
|
$ 0.18
|
|
| Other assets |
$ 1,491
|
|
$ 1,491
|
|
$ 1,618
|
| Current portion of deferred revenue |
4,990
|
|
4,990
|
|
4,538
|
| Other long-term liabilities |
4,164
|
|
4,164
|
|
3,942
|
| Stockholders' equity |
$ 171,093
|
|
$ 171,093
|
|
169,528
|
| Accounting Standards Update 2014-09 | As previously reported |
|
|
|
|
|
| Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |
|
|
|
|
|
| Revenue |
|
$ 61,409
|
|
$ 111,644
|
|
| Income tax expense (benefit) |
|
247
|
|
(2,534)
|
|
| Net income |
|
$ 3,893
|
|
$ 4,736
|
|
| Basic earnings per share (in dollars per share) |
|
$ 0.16
|
|
$ 0.19
|
|
| Diluted earnings per share (in dollars per share) |
|
$ 0.15
|
|
$ 0.18
|
|
| Other assets |
|
|
|
|
1,576
|
| Current portion of deferred revenue |
|
|
|
|
2,311
|
| Other long-term liabilities |
|
|
|
|
882
|
| Stockholders' equity |
|
|
|
|
174,773
|
| Accounting Standards Update 2014-09 | ASC 606 adjustment |
|
|
|
|
|
| Revenue, Initial Application Period Cumulative Effect Transition [Line Items] |
|
|
|
|
|
| Revenue |
|
$ (157)
|
|
$ (184)
|
|
| Income tax expense (benefit) |
|
(5)
|
|
(10)
|
|
| Net income |
|
$ (152)
|
|
$ (174)
|
|
| Basic earnings per share (in dollars per share) |
|
$ (0.01)
|
|
|
|
| Diluted earnings per share (in dollars per share) |
|
$ (0.01)
|
|
|
|
| Other assets |
|
|
|
|
42
|
| Current portion of deferred revenue |
|
|
|
|
2,227
|
| Other long-term liabilities |
|
|
|
|
3,060
|
| Stockholders' equity |
|
|
|
|
$ (5,245)
|