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Note 9 - Share-based Compensation and Employee Benefit Plan (Details Textual) - USD ($)	3 Months Ended		9 Months Ended		21 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021
Labor and Related Expense	$ 2,843,000	$ 3,460,000	$ 7,506,000	$ 10,966,000
Payments of Ordinary Dividends, Common Stock					$ 0
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay			50.00%
Defined Contribution Plan, Cost	46,000	48,000	$ 157,000	199,000
Restricted Stock [Member]
Share-based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount	$ 244,000		$ 244,000		$ 244,000
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition (Year)			3 years 3 months 7 days
2012 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)	3,000,000		3,000,000		3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in shares)	2,834,617		2,834,617		2,834,617
Share-based Payment Arrangement, Expense	$ 30,000	42,000	$ 110,000	123,000
2012 Stock Plan [Member] | Patriot's External Directors [Member]
Share-based Payment Arrangement, Expense	5,000	21,000	45,000	59,000
Labor and Related Expense	68,000	87,000	252,000	342,000
2012 Stock Plan [Member] | Share-based Payment Arrangement, Employee [Member]
Share-based Payment Arrangement, Expense	$ 25,000	$ 21,000	$ 65,000	$ 64,000
2012 Stock Plan [Member] | Restricted Stock [Member] | Share-based Payment Arrangement, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			4 years
2012 Stock Plan [Member] | Restricted Stock [Member] | Share-based Payment Arrangement, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)			5 years

X

- Definition

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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