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Debt - Narrative (Details) |  |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | ---
Dec. 31, 2019 USD ($) | Dec. 23, 2019 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2020 USD ($) | Dec. 22, 2019 USD ($) | Dec. 31, 2018 USD ($) termLoan property | Dec. 31, 2017 USD ($) property | Jun. 30, 2020 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Deferred financing costs, gross |  | $ 500,000 |  |  |  |  |  |
Long-term debt | $ 173,913,000 | 168,300,000 | $ 173,913,000 | $ 174,105,000 |  |  |  |
Legal and tax costs |  | 400,000 |  |  |  |  |  |
Cash, cash equivalents and restricted cash | 169,319,000 | 0 | 169,319,000 | 92,643,000 | $ 1,556,000 | $ 1,950,000 |  |
Deferred financing costs, net | 1,552,000 |  | 1,552,000 | 1,198,000 |  |  |  |
Amortization of deferred financing costs | 14,000 |  |  | 621,000 | 1,024,000 |  |  |
Interest expense | 173,000 |  |  | 4,741,000 | 10,712,000 |  |  |
Number of properties refinanced | property |  |  |  |  |  |  | 3 |
Number of term loans assumed | termLoan |  |  |  |  |  | 5 |  |
Residual Amount From Acquisition |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Cash, cash equivalents and restricted cash | 4,300,000 |  | 4,300,000 |  |  |  |  |
Five Properties |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Number of properties acquired | property |  |  |  |  |  | 5 |  |
Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, face amount |  |  |  |  |  | $ 14,100,000 | $ 3,300,000 |
Fixed interest rate (as a percent) |  |  |  |  |  | 5.773% |  |
London Interbank Offered Rate (LIBOR) | Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  |  |  |  |  | 3.75% |
Credit Facility |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Amortization of deferred financing costs | 100,000 |  |  | 600,000 |  |  |  |
Credit Facility | Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, face amount | 175,000,000.0 | 175,000,000.0 | $ 175,000,000.0 |  |  |  |  |
Debt instrument, extension term |  |  | 1 year |  |  |  |  |
Deferred financing costs, gross |  |  |  | 1,100,000 |  |  |  |
Deferred financing costs, net | $ 1,100,000 |  | $ 1,100,000 | $ 900,000 |  |  |  |
Effective interest rate (as a percent) | 3.28% |  | 3.28% |  |  |  |  |
Weighted average effective interest rate (as a percent) |  |  |  | 1.97% |  |  |  |
Interest expense | $ 200,000 |  |  | $ 3,500,000 |  |  |  |
Credit Facility | Revolver | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity | 250,000,000.0 | 250,000,000.0 | $ 250,000,000.0 |  |  |  |  |
Debt instrument, extension term |  |  | 1 year |  |  |  |  |
Deferred financing costs, gross |  |  |  | 1,600,000 |  |  |  |
Deferred financing costs, net | 1,600,000 |  | $ 1,600,000 | $ 1,200,000 |  |  |  |
Weighted average effective interest rate (as a percent) |  |  |  | 1.54% |  |  |  |
Unused borrowing capacity, fee |  |  |  | $ 100,000 |  |  |  |
Credit Facility | Revolver | Line of Credit | Unused lines of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Unused borrowing capacity, fee | $ 100,000 |  |  | $ 600,000 |  |  |  |
Credit Facility | Minimum | Revolver | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Revolver facility fee (as a percent) |  |  | 0.15% |  |  |  |  |
Credit Facility | Maximum | Revolver | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Revolver facility fee (as a percent) |  |  | 0.25% |  |  |  |  |
Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum | Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 1.25% |  |  |  |  |
Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum | Satisfaction of Requirements | Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 1.15% |  |  |  |  |
Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum | Revolver | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 1.35% |  |  |  |  |
Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum | Revolver | Satisfaction of Requirements | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 1.20% |  |  |  |  |
Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum | Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 2.25% |  |  |  |  |
Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum | Satisfaction of Requirements | Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 1.60% |  |  |  |  |
Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum | Revolver | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 2.30% |  |  |  |  |
Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum | Revolver | Satisfaction of Requirements | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 1.80% |  |  |  |  |
Credit Facility | Base Rate | Minimum | Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 0.25% |  |  |  |  |
Credit Facility | Base Rate | Minimum | Satisfaction of Requirements | Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 0.15% |  |  |  |  |
Credit Facility | Base Rate | Minimum | Revolver | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 0.35% |  |  |  |  |
Credit Facility | Base Rate | Minimum | Revolver | Satisfaction of Requirements | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 0.20% |  |  |  |  |
Credit Facility | Base Rate | Maximum | Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 1.25% |  |  |  |  |
Credit Facility | Base Rate | Maximum | Satisfaction of Requirements | Term Loan |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 0.60% |  |  |  |  |
Credit Facility | Base Rate | Maximum | Revolver | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 1.30% |  |  |  |  |
Credit Facility | Base Rate | Maximum | Revolver | Satisfaction of Requirements | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  |  | 0.80% |  |  |  |  |
Amendment to Credit Facility | Minimum | Revolver | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Deferred financing costs, gross |  |  |  |  |  |  |  | $ 100,000
Predecessor Credit Facility | Revolver | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  | 289,800,000 |  |  |  |  |  |
Amortization of deferred financing costs |  |  |  |  | 1,000,000.0 |  |  |
Interest expense |  |  |  |  | $ 9,300,000 |  |  |
Accordion feature |  | $ 30,000,000 |  |  |  |  |  |
Amortization period of interest payments |  | 30 years |  |  |  |  |  |
Predecessor Credit Facility | London Interbank Offered Rate (LIBOR) | Minimum | Revolver | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  | 2.40% |  |  |  |  |  |
Predecessor Credit Facility | London Interbank Offered Rate (LIBOR) | Maximum | Revolver | Line of Credit |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Debt instrument, basis spread on variable rate (as a percent) |  | 2.50% |  |  |  |  |  |

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