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9. Stock Options (Details - Common Shares Reserved for Future Issuance)
shares in Thousands
Dec. 31, 2020
shares
Common shares reserved for future issuance (in shares) 1,081
2015 Plan [Member]  
Common shares reserved for future issuance (in shares) 555
2005 Plan [Member]  
Common shares reserved for future issuance (in shares) 526