Quarterly report pursuant to Section 13 or 15(d)

Debt - Spartan Revolving Line of Credit Facility (Narrative) (Details)

v3.21.2
Debt - Spartan Revolving Line of Credit Facility (Narrative) (Details) - Spartan Revolving Line of Credit Facility - Revolving Credit Facility - USD ($)
Sep. 30, 2021
Jun. 04, 2021
Line of Credit Facility [Line Items]    
Borrowing capacity   $ 8,000,000.0
Available borrowing capacity $ 8,000,000.0