| Period | Value | YoY Chg | Change % | Date | Report | Filed |
|---|---|---|---|---|---|---|
| Q4 2022 | $4.75M | -$4.1M | -46.3% | Dec 31, 2022 | 10-K | 2023-02-24 |
| Q3 2022 | $5.76M | -$4.21M | -42.2% | Sep 30, 2022 | 10-Q | 2022-10-31 |
| Q2 2022 | $6.79M | -$4.31M | -38.8% | Jun 30, 2022 | 10-Q | 2022-07-29 |
| Q1 2022 | $7.82M | -$4.42M | -36.1% | Mar 31, 2022 | 10-Q | 2022-05-05 |
| Q4 2021 | $8.84M | -$4.52M | -33.8% | Dec 31, 2021 | 10-K | 2023-02-24 |
| Q3 2021 | $9.97M | -$4.64M | -31.7% | Sep 30, 2021 | 10-Q | 2021-11-04 |
| Q2 2021 | $11.1M | -$4.75M | -30% | Jun 30, 2021 | 10-Q | 2021-08-05 |
| Q1 2021 | $12.2M | -$4.87M | -28.5% | Mar 31, 2021 | 10-Q | 2021-05-06 |
| Q4 2020 | $13.4M | -$4.99M | -27.2% | Dec 31, 2020 | 10-K | 2022-02-25 |
| Q3 2020 | $14.6M | -$5.14M | -26% | Sep 30, 2020 | 10-Q | 2020-11-05 |
| Q2 2020 | $15.9M | -$5.3M | -25.1% | Jun 30, 2020 | 10-Q | 2020-08-06 |
| Q1 2020 | $17.1M | -$5.46M | -24.2% | Mar 31, 2020 | 10-Q | 2020-05-07 |
| Q4 2019 | $18.3M | -$5.62M | -23.4% | Dec 31, 2019 | 10-K | 2021-02-25 |
| Q3 2019 | $19.8M | -$5.76M | -22.6% | Sep 30, 2019 | 10-Q | 2019-11-06 |
| Q2 2019 | $21.2M | -$5.89M | -21.8% | Jun 30, 2019 | 10-Q | 2019-08-06 |
| Q1 2019 | $22.6M | -$6.03M | -21.1% | Mar 31, 2019 | 10-Q | 2019-05-03 |
| Q4 2018 | $24M | -$6.17M | -20.5% | Dec 31, 2018 | 10-K | 2020-02-28 |
| Q3 2018 | $25.5M | -$6.31M | -19.8% | Sep 30, 2018 | 10-Q | 2018-11-02 |
| Q2 2018 | $27M | -$6.46M | -19.3% | Jun 30, 2018 | 10-Q | 2018-08-09 |
| Q1 2018 | $28.6M | -$6.61M | -18.8% | Mar 31, 2018 | 10-Q | 2018-05-04 |
| Q4 2017 | $30.1M | -$6.76M | -18.3% | Dec 31, 2017 | 10-K | 2019-02-21 |
| Q3 2017 | $31.8M | -$6.93M | -17.9% | Sep 30, 2017 | 10-Q | 2017-11-03 |
| Q2 2017 | $33.5M | -$7.11M | -17.5% | Jun 30, 2017 | 10-Q | 2017-08-04 |
| Q1 2017 | $35.2M | -$7.75M | -18% | Mar 31, 2017 | 10-Q | 2017-05-05 |
| Q4 2016 | $36.9M | -$8.62M | -18.9% | Dec 31, 2016 | 10-K | 2018-02-23 |
| Q3 2016 | $38.8M | -$9.56M | -19.8% | Sep 30, 2016 | 10-Q | 2016-11-04 |
| Q2 2016 | $40.6M | -$10.5M | -20.5% | Jun 30, 2016 | 10-Q | 2016-08-05 |
| Q1 2016 | $42.9M | -$11M | -20.4% | Mar 31, 2016 | 10-Q | 2016-05-06 |
| Q4 2015 | $45.5M | -$11.2M | -19.8% | Dec 31, 2015 | 10-K | 2017-02-23 |
| Q3 2015 | $48.3M | -$11.5M | -19.3% | Sep 30, 2015 | 10-Q | 2015-11-05 |
| Q2 2015 | $51.1M | -$11.8M | -18.8% | Jun 30, 2015 | 10-Q | 2015-08-06 |
| Q1 2015 | $53.9M | Mar 31, 2015 | 10-Q | 2015-05-07 | ||
| Q4 2014 | $56.7M | +$44.4M | +358% | Dec 31, 2014 | 10-K | 2016-02-25 |
| Q3 2014 | $59.8M | Sep 30, 2014 | 10-Q | 2014-11-07 | ||
| Q2 2014 | $62.9M | Jun 30, 2014 | 10-Q | 2014-08-05 | ||
| Q4 2013 | $12.4M | Dec 31, 2013 | 10-K | 2015-02-23 |