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Stock-Based Compensation (Tables)
 3 Months Ended
Mar. 31, 2024
Share-Based Payment Arrangement [Abstract]  
Schedule of Non-Cash Stock-Based Compensation Expense
Non-cash stock-based compensation expenses related to stock options, restricted stock grants and the ESPP were recorded in the financial statements as follows (unaudited, in thousands):
Three Months Ended March 31,
20242023
Sales and marketing$309 $162 
Research and development264 224 
General and administrative563 559 
Total non-cash stock compensation expense$1,136 $945 
Summary of Outstanding Stock Options
A summary of the Company’s stock options outstanding and related information under the 2015 OEIP and 2005 Plan for the three months ended March 31, 2024 are as follows (unaudited, in thousands except weighted average exercise price and weighted average remaining contractual life):
Shares
Weighted Avg. Exercise Price
Wtd. Avg. Remaining Contractual Life (Yrs)Aggregate Intrinsic Value
Outstanding as of December 31, 202310 $26.42 3.9$— 
Forfeited— 15.04 — — 
Outstanding as of March 31, 202410 $26.48 3.6$— 
Vested and expected to vest at March 31, 202410 $26.45 3.6$— 
Exercisable as of March 31, 20249 $25.91 3.4$— 
Summary of Restricted Stock Awards Outstanding
A summary of the Company’s restricted stock awards outstanding under the 2015 OEIP for the three months ended March 31, 2024 are as follows (unaudited, in thousands, except weighted average grant date fair value):
Shares
Weighted average grant date fair value
Unvested at December 31, 2023255 $21.29 
Granted275 6.46 
Vested(69)18.68 
Canceled and forfeited(9)11.49 
Unvested at March 31, 2024452 $12.84