XML 18 R7.htm IDEA: XBRL DOCUMENT v3.22.1
Condensed Statements of Cash Flows (Unaudited) (Parenthetical) - USD ($)
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Statement Of Cash Flows [Abstract]    
Fixed assets purchased under finance lease obligations $ 0 $ 894,000
Unpaid fixed assets $ 60,000 $ 319,000