Summary of Significant Accounting Policies (Details Narrative)	3 Months Ended						9 Months Ended
	Sep. 30, 2020 USD ($) shares	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Sep. 30, 2019 USD ($) shares	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Sep. 30, 2020 USD ($) shares	Sep. 30, 2019 USD ($) shares	May 26, 2020 USD ($)	Dec. 31, 2019 USD ($) shares
Liquidity Matters
Net Loss	$ (9,606,000)	$ (9,811,000)	$ (1,155,000)	$ (2,333,000)	$ (34,833,000)	$ (1,754,000)	$ (20,572,000)	$ (38,920,000)
Number of Parking Tenants	14			16			14	16
Concentration Risk, Percentage, Major Customer, SP+							61.00%
Major Customer SP+ Characteristics							SP+ is one of the largest providers of parking management in the United States. As of September 30, 2020, SP+ managed approximately 3,200 locations in North America.
Impairment of Long-Lived Assets	$ 6,500,000			$ 500,000			$ 14,100,000	$ 1,400,000
Federally Insured Amount Limit	250,000						250,000			$ 250,000
Cash In Excess Of The Federally Insured Limits	700,000						700,000			$ 2,700,000
Advertising Costs
Outstanding Common Share Equivalents | shares
Preferred Stock Series A [Member]
Liquidity Matters
Preferred stock, shares outstanding | shares	2,862						2,862			2,862
Preferred Stock Series 1 [Member]
Liquidity Matters
Preferred stock, shares outstanding | shares	39,811						39,811			39,811
Liquidity [Member]
Liquidity Matters
Net Loss							$ 20,000,000
Cash, Cash Equivalents and Restricted Cash	$ 6,900,000						6,900,000
Sale of Property									$ 4,100,000
CARES Act Loan Funding Received							$ 348,000