| Period | Value | YoY Chg | Change % | Date | Report | Filed |
|---|---|---|---|---|---|---|
| Q4 2023 | $18.1M | +$346K | +1.94% | Dec 31, 2023 | 10-K | 2024-02-23 |
| Q4 2022 | $17.8M | -$647K | -3.51% | Dec 31, 2022 | 10-K | 2024-02-23 |
| Q4 2021 | $18.4M | -$799K | -4.15% | Dec 31, 2021 | 10-K | 2024-02-23 |
| Q4 2020 | $19.2M | +$935K | +5.11% | Dec 31, 2020 | 10-K | 2023-02-24 |
| Q4 2019 | $18.3M | -$191K | -1.03% | Dec 31, 2019 | 10-K | 2022-02-25 |
| Q4 2018 | $18.5M | -$533K | -2.8% | Dec 31, 2018 | 10-K | 2021-02-26 |
| Q4 2017 | $19M | +$1.35M | +7.63% | Dec 31, 2017 | 10-K | 2020-02-28 |
| Q3 2017 | $18.9M | +$540K | +2.95% | Sep 30, 2017 | 10-Q | 2017-11-09 |
| Q2 2017 | $18.5M | +$272K | +1.49% | Jun 30, 2017 | 10-Q | 2017-08-04 |
| Q1 2017 | $17.8M | -$646K | -3.5% | Mar 31, 2017 | 10-Q | 2017-05-10 |
| Q4 2016 | $17.7M | -$291K | -1.62% | Dec 31, 2016 | 10-K | 2019-03-01 |
| Q3 2016 | $18.3M | +$70K | +0.38% | Sep 30, 2016 | 10-Q | 2016-11-04 |
| Q2 2016 | $18.2M | -$29K | -0.16% | Jun 30, 2016 | 10-Q | 2016-08-05 |
| Q1 2016 | $18.5M | +$605K | +3.39% | Mar 31, 2016 | 10-Q | 2016-05-06 |
| Q4 2015 | $18M | -$1.15M | -5.99% | Dec 31, 2015 | 10-K | 2018-02-23 |
| Q3 2015 | $18.3M | -$1.36M | -6.93% | Sep 30, 2015 | 10-Q | 2015-11-06 |
| Q2 2015 | $18.2M | -$2.36M | -11.5% | Jun 30, 2015 | 10-Q | 2015-08-07 |
| Q1 2015 | $17.9M | -$2.81M | -13.6% | Mar 31, 2015 | 10-Q | 2015-05-08 |
| Q4 2014 | $19.1M | -$1.55M | -7.51% | Dec 31, 2014 | 10-K | 2017-02-24 |
| Q3 2014 | $19.6M | -$837K | -4.09% | Sep 30, 2014 | 10-Q | 2014-11-06 |
| Q2 2014 | $20.6M | +$641K | +3.21% | Jun 30, 2014 | 10-Q | 2014-08-08 |
| Q1 2014 | $20.7M | +$893K | +4.51% | Mar 31, 2014 | 10-Q | 2014-05-09 |
| Q4 2013 | $20.7M | +$550K | +2.73% | Dec 31, 2013 | 10-K | 2016-02-26 |
| Q3 2013 | $20.4M | +$624K | +3.15% | Sep 30, 2013 | 10-Q | 2013-11-08 |
| Q2 2013 | $20M | +$284K | +1.44% | Jun 30, 2013 | 10-Q | 2013-08-08 |
| Q1 2013 | $19.8M | -$463K | -2.29% | Mar 31, 2013 | 10-Q | 2013-05-09 |
| Q4 2012 | $20.1M | +$188K | +0.94% | Dec 31, 2012 | 10-K | 2015-02-27 |
| Q3 2012 | $19.8M | -$513K | -2.52% | Sep 30, 2012 | 10-Q | 2012-11-09 |
| Q2 2012 | $19.7M | -$1.67M | -7.83% | Jun 30, 2012 | 10-Q | 2012-08-09 |
| Q1 2012 | $20.2M | -$808K | -3.84% | Mar 31, 2012 | 10-Q | 2012-05-10 |
| Q4 2011 | $19.9M | -$400K | -1.97% | Dec 31, 2011 | 10-K | 2014-03-14 |
| Q3 2011 | $20.3M | Sep 30, 2011 | 10-Q | 2011-11-08 | ||
| Q2 2011 | $21.3M | Jun 30, 2011 | 10-Q | 2011-08-08 | ||
| Q1 2011 | $21.1M | Mar 31, 2011 | 10-Q | 2011-05-10 | ||
| Q4 2010 | $20.3M | Dec 31, 2010 | 10-K | 2013-03-15 |