Represents the amount under the contract as a percent of the entity's requirements.

No definition available.

Name:	tis_LongTermPurchaseCommitmentPercentageOfRequirement
Namespace Prefix:	tis_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the price per unit of goods that must be purchased within the specified time period of the agreement to avoid penalties or unfavorable effects on pricing, among other adverse consequences.

+ References

No definition available.

+ Details

Name:	tis_LongTermPurchaseCommitmentPricePerUnit
Namespace Prefix:	tis_
Data Type:	us-types:perUnitItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the actual amount of purchases under the gas contract.

+ References

No definition available.

+ Details

Name:	tis_LongTermPurchaseCommitmentPurchaseAmount
Namespace Prefix:	tis_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Energy volume that must be purchased within the specified time period of the agreement to avoid penalties or unfavorable effects on pricing, among other adverse consequences.

+ References

No definition available.

+ Details

Name:	us-gaap_LongTermPurchaseCommitmentMinimumEnergyVolumeRequired
Namespace Prefix:	us-gaap_
Data Type:	num:energyItemType
Balance Type:	na
Period Type:	duration

- Definition

Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

+ References

No definition available.

+ Details

Name:	us-gaap_PurchaseObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=us-gaap_InventoriesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=us-gaap_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementGeographicalAxis=tis_BarnwellSouthCarolinaMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongTermPurchaseCommitmentByCategoryOfItemPurchasedAxis=us-gaap_CapitalAdditionsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=tis_ManufacturingFacilityAndEquipmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Note 4 - Commitments and Contingencies (Details Textual) $ in Millions	3 Months Ended			9 Months Ended
	Dec. 31, 2017 MMBTU $ / MMBTU	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2016 USD ($)
Inventories [Member]
Long-term Purchase Commitment Purchase, Amount		$ 0.5	$ 0.4	$ 1.4	$ 1.2
Inventories [Member] \| Scenario, Forecast [Member]
Long-term Purchase Commitment, Minimum Energy Volume Required \| MMBTU	117,055
Long Term Purchase Commitment Price Per Unit \| $ / MMBTU	4.06
Inventories [Member] \| Minimum [Member]
Long-term Purchase Commitment Percentage of Requirement				80.00%
Inventories [Member] \| Maximum [Member]
Long-term Purchase Commitment Percentage of Requirement				90.00%
Barnwell South Carolina [Member] \| Capital Addition Purchase Commitments [Member] \| Manufacturing Facility And Equipment [Member]
Purchase Obligation		$ 0.4		$ 0.4