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Note 5 - Share-based Compensation and Employee Benefit Plan (Details Textual) - USD ($)			3 Months Ended		9 Months Ended
	Jul. 24, 2017	Jan. 04, 2016	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jun. 30, 2017	Dec. 31, 2016	Jun. 30, 2016	Dec. 31, 2015
Labor and Related Expense			$ 2,741,000	$ 2,169,000	$ 7,668,000	$ 7,334,000
Defined Contribution Plan, Employer Matching Contribution, Percent of Employees' Gross Pay					50.00%
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent					6.00%
Defined Contribution Plan, Cost			$ 37,000	$ 39,000	$ 132,000	$ 120,000
Common Stock, Dividends, Per Share, Declared	$ 0.01					$ 0
Payments of Ordinary Dividends, Common Stock					$ 39,000	$ 0
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period					5,084	58,084
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			1,692	1,688	3,923	4,214
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period			600	65,500	6,600	69,713
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number			29,825	40,011	29,825	40,011	32,117	35,264	107,199	55,854
2012 Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized			3,000,000		3,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant			2,887,032		2,887,032
Allocated Share-based Compensation Expense			$ 37,000		$ 105,000	$ 126,000
Allocated Share-based Compensation Expense, Reversal				$ 182,000
2012 Stock Plan [Member] | Employees [Member]
Allocated Share-based Compensation Expense			16,000		48,000	80,000
Allocated Share-based Compensation Expense, Reversal				198,000
2012 Stock Plan [Member] | Patriot's External Directors [Member]
Allocated Share-based Compensation Expense			21,000	16,000	57,000	46,000
2012 Stock Plan [Member] | Patriot's External Directors [Member] | Other Nonoperating Income (Expense) [Member]
Labor and Related Expense			$ 80,000	$ 75,000	$ 226,000	$ 227,000
2012 Stock Plan [Member] | Phantom Share Units (PSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding, Number			0		0			0
2012 Stock Plan [Member] | Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period			1,692		3,923
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period			600		6,600
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options			$ 321,000		$ 321,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition					2 years 98 days
2012 Stock Plan [Member] | Restricted Stock [Member] | Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period					5,084	5,884
2012 Stock Plan [Member] | Restricted Stock [Member] | Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period					0	52,200
2012 Stock Plan [Member] | Restricted Stock [Member] | Non-executive Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period					600	1,800
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options			$ 41,000		$ 41,000
Stock Granted During Period, Shares, Gross Per Employee		100
Stock Issued During Period, Shares, Restricted Stock Award, Gross		8,700
Share Price		$ 15.50
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number			6,300		6,300
2012 Stock Plan [Member] | Restricted Stock [Member] | Share-based Compensation Award, Tranche Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					4 years
2012 Stock Plan [Member] | Restricted Stock [Member] | Share-based Compensation Award, Tranche Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period					5 years

X

- Definition

Represents the reversal of the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

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The number of shares granted per employee eligible under the plan.

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Aggregate dividends declared during the period for each share of common stock outstanding.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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The aggregate amount of expenditures for salaries, wages, profit sharing and incentive compensation, and other employee benefits, including equity-based compensation, and pension and other postretirement benefit expense.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Price of a single share of a number of saleable stocks of a company.

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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