Annual report pursuant to Section 13 and 15(d)

Note 8 - Discontinued Operations and Divestitures (Details Textual)

Note 8 - Discontinued Operations and Divestitures (Details Textual)							1 Months Ended	3 Months Ended		12 Months Ended
	Dec. 07, 2015 USD ($)	Sep. 29, 2015 USD ($)	Jul. 02, 2015 USD ($)	Jun. 04, 2015 USD ($)	Aug. 14, 2014 USD ($)	Jul. 29, 2014 USD ($)	Jun. 30, 2014 USD ($)	Dec. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Aug. 04, 2015 USD ($)
PFSG [Member] \| PFSG Facility Fire Damage [Member]
Maximum Deductible Amount in Insurance for General Liability					$ 300,000
Proceeds from Insurance Settlement, Investing Activities							$ 3,850,000
Disposal Group, Including Discontinued Operation, Gain (Loss) on Insurance Settlement											$ 3,842,000
PFSG [Member] \| Interest Expense [Member] \| Arbitration with Contractor [Member]
Loss Contingency, Loss in Period								$ 400,000
PFSG [Member] \| Arbitration with Contractor [Member] \| Interest of Unpaid Invoices [Member]
Loss Contingency, Damages Sought, Value								600,000
Loss Contingency, Damages Awarded, Value	$ 400,000
PFSG [Member] \| Arbitration with Contractor [Member] \| Contract Penalties [Member]
Loss Contingency, Damages Sought, Value								800,000
PFSG [Member] \| Arbitration with Contractor [Member] \| Attorney Fees [Member]
Loss Contingency, Damages Sought, Value								500,000
Loss Contingency, Damages Awarded, Value	125,000
PFSG [Member] \| Arbitration with Contractor [Member] \| Unpaid Invoices [Member]
Loss Contingency, Damages Awarded, Value	747,000
PFSG [Member] \| Arbitration with Contractor [Member] \| Administrative Fees [Member]
Loss Contingency, Damages Awarded, Value	6,000
PFSG [Member] \| Arbitration with Contractor [Member]
Loss Contingency, Damages Sought, Value								1,400,000
Loss Contingency, Damages Awarded, Value	$ 1,278,000
Loss Contingency Accrual								871,000		$ 871,000
Loss Contingency, Loss in Period								407,000
PFSG [Member]
Tangible Asset Impairment Charges											723,000
Payments for Hazardous Waste Management and Permit Violations			$ 201,200
PFMI [Member] \| Loss Income from Discontinued Operations, Net of Taxes [Member]
Asset Impairment Charges									$ 150,000
PFMI [Member]
Letter of Intent Receivable for Property Discontinued Operations		$ 450,000		$ 450,000
Escrow Deposits Related to Property Sales		20,000
Accrual for Environmental Loss Contingencies, Period Increase (Decrease)										(38,000)
Escrow Deposit		$ 20,000
PFSG and PFM [Member]
Payments for Environmental Liabilities										78,000
SYA [Member] \| Other Expense [Member]
Gain (Loss) on Disposition of Business											(53,000)
SYA [Member]
Proceeds from Divestiture of Businesses						$ 1,300,000
Disposal Group Capital Stock Sold Percentage						100.00%
Disposal Group Working Capital Adjustment						$ 60,000					(42,000)
Escrow Deposit						$ 50,000						$ 50,000
Escrow Deposit Term						1 year
Disposal Group, Including Discontinued Operation, Other Expense						$ 96,000
Gain (Loss) on Disposition of Business											(53,000)
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation											0
Not Held for Sale [Member]
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment								10,000		$ 10,000
Number of Previously Shut Down Locations										2
Disposal Group, Including Discontinued Operation, Gain (Loss) on Insurance Settlement											3,842,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment								49,707,000		$ 49,707,000	47,123,000
Number of Remediation Projects										3
Accrual for Environmental Loss Contingencies								900,000		$ 900,000	1,016,000
Accrued Environmental Loss Contingencies, Current								$ 9,000		9,000
Accrual for Environmental Loss Contingencies, Period Increase (Decrease)										$ (116,000)
Gain (Loss) on Disposition of Business											(53,000)
Discontinued Operation, Tax Effect of Gain (Loss) from Disposal of Discontinued Operation										$ 51,000	$ (46,000)