Supplemental Financial Statement Information - Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Nov. 30, 2020
Accounts Payable and Accrued Liabilities
Accrued construction costs and retainage	$ 1,817	$ 94	$ 439
Accrued lease commissions	1,748	233	269
Trade payables	1,149	1,093	914
Accrued interest payable	594	580	584
Accrued salaries, wages and other compensation	306	1,027	1,130
Other	870	642	756
Total accounts payable and accrued liabilities	6,484	3,669	4,092
Other Liabilities
Interest rate swap liabilities	5,536	8,766	8,962
Deferred compensation plan	4,529	4,335	4,170
Prepaid rent from tenants	1,433	1,345	1,435
Lease liabilities	$ 711	$ 739	$ 748
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Lease liabilities	Lease liabilities	Lease liabilities
Security deposits of tenants	$ 693	$ 710	$ 690
Intangible liability, net	667	695	705
Conditional asset retirement obligations	161	161	161
Other	160	160	100
Total other liabilities	14,391	17,567	17,652
Warrant Liability
Other Liabilities
Contingent value rights liability	8,685
Contingent Value Rights Liability
Other Liabilities
Contingent value rights liability	$ 501	$ 656	$ 681