XML 15 R4.htm IDEA: XBRL DOCUMENT v3.21.1
CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares
Mar. 31, 2021
Dec. 31, 2020
Stockholders' equity:    
Common stock, shares authorized 100,000,000 100,000,000
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, shares issued 16,267,157 16,203,979
Common stock, shares outstanding 16,267,157 16,203,979