SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	3 Months Ended
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)	Mar. 31, 2016
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles in the United States of America ("GAAP") for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by GAAP for complete consolidated financial statements. The Accounting Standards Codification ("ASC") as produced by the Financial Accounting Standards Board ("FASB") is the sole source of authoritative GAAP. The information furnished includes all adjustments, which are, in the opinion of management, necessary to present fairly our financial position as of March 31, 2016 and the results of our operations and changes in our cash flows for the periods ended March 31, 2016 and 2015. Results of operations for the period ended March 31, 2016 are not necessarily indicative of the results that may be expected for the entire year. Additional information, including the audited December 31, 2015 consolidated financial statements and the Summary of Significant Accounting Policies, is included in our Annual Report on Form 10-K for the year ended December 31, 2015, on file with the Securities and Exchange Commission.
Estimates	In preparing the consolidated financial statements in accordance with GAAP for interim financial information and with the instructions to Form 10-Q and Article 10 of Regulation S-X, management must make estimates and assumptions. These estimates and assumptions affect the amounts reported for assets, liabilities, revenues and expenses, as well as affecting the disclosures provided. Examples of estimates include the allowance for doubtful accounts, estimates of deferred income tax assets and liabilities, estimates of inventory balances, and estimates of stock option and warrant values. The Company also uses estimates when assessing fair values of assets and liabilities acquired in business acquisitions as well as any fair value and any related impairment charges related to the carrying value of inventory and machinery and equipment and other long-lived assets. Despite the Company’s intention to establish accurate estimates and use reasonable assumptions, actual results may differ from these estimates.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include the accounts of the Company and its wholly-owned subsidiaries. Upon consolidation, all inter-company accounts, transactions and profits have been eliminated.
Reclassifications	Reclassifications The Company has reclassified certain items within the accompanying Condensed Consolidated Financial Statements and Notes to Condensed Consolidated Financial Statements for the prior year in order to be comparable with the current presentation. These reclassifications had no effect on previously reported income (loss) or shareholders' equity.
Discontinued Operations	Discontinued Operations Prior year financial statements have been recast to reflect the sale of the Company’s Waste Services Segment assets in the fourth quarter of 2015 in accordance with the Financial Accounting Standards Board Accounting Standards Codification 205-20-55 within discontinued operations. Results of discontinued operations are excluded from the accompanying Notes to Condensed Consolidated Financial Statements for all periods presented, unless otherwise noted. See Note 10 - Discontinued Operations.
Fair Value	Fair Value The Company carries certain of its financial assets and liabilities at fair value on a recurring basis. These financial assets and liabilities are composed of cash and cash equivalents and derivative instruments. Long-term debt is carried at cost, and the fair value is disclosed herein. In addition, the Company measures certain assets, such as long-lived assets, at fair value on a non-recurring basis to evaluate those assets for potential impairment. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. In accordance with applicable accounting standards, the Company categorizes its financial assets and liabilities into the following fair value hierarchy: Level 1 – Financial assets and liabilities with values based on unadjusted quoted prices for identical assets or liabilities in an active market. Examples of Level 1 financial instruments include active exchange-traded securities. Level 2 – Financial assets and liabilities with values based on quoted prices for similar assets and liabilities in active markets, and inputs that are observable for the asset or liability, either directly or indirectly, for substantially the full term of the asset or liability. Examples of Level 2 financial instruments include various types of interest-rate and commodity-based derivative instruments, and various types of fixed-income investment securities. Pricing models are utilized to estimate fair value for certain financial assets and liabilities categorized in Level 2. Level 3 – Financial assets and liabilities with values based on prices or valuation techniques that require inputs that are both unobservable in the market and significant to the overall fair value measurement. These inputs reflect management’s judgment about the assumptions that a market participant would use in pricing the asset or liability, and are based on the best available information, some of which is internally developed. When determining the fair value measurements for financial assets and liabilities carried at fair value on a recurring basis, the Company considers the principal or most advantageous market in which it would transact and consider assumptions that market participants would use when pricing the asset or liability. When possible, ISA looks to active and observable markets to price identical assets or liabilities. When identical assets and liabilities are not traded in active markets, the Company looks to market observable data for similar assets and liabilities. Nevertheless, certain assets and liabilities are not actively traded in observable markets, and uses alternative valuation techniques to derive fair value measurements. The Company uses the fair value methodology outlined in the related accounting standards to value the assets and liabilities for cash, debt and derivatives. All of our cash is defined as Level 1 and all our debt and derivative contracts are defined as Level 2.
Stock Option Plan	Common Stock and Share-based Compensation Arrangements The Company has a Long Term Incentive Plan adopted in 2009 ("LTIP") under which it may grant equity awards for up to 2.4 million shares of common stock, which are reserved by the Board of Directors for issuance of equity awards. The Company provides compensation benefits by granting stock options and other share-based awards to employees and directors. The exercise price of each option is equal to the market price of our stock on the date of grant. The maximum term of the option is five years. The plan is accounted for based on FASB’s authoritative guidance titled "ASC 718 - Compensation - Stock Compensation." The Company recognizes share-based compensation expense for the fair value of the awards, on the date granted on a straight-line basis over their vesting term. Compensation expense is recognized only for share-based payments expected to vest. The Company estimates forfeitures at the date of grant based on our historical experience and future expectations. Subject to shareholder approval and restrictions on exercisability set forth in a Stock Option Agreement entered into on December 2, 2013 between the Company and Algar (the “Stock Option Agreement”), the Company granted Algar an option to purchase a total of 1.5 million shares (in four tranches) of Company common stock (the "Algar Options") at an exercise price per share of $5.00. The Algar Options were not issued under the LTIP. The Company's shareholders approved the Algar Options on October 15, 2014. The Company uses the Modified Black-Scholes-Merton option-pricing model to value the Company's stock options for each employee stock option award. The Company uses the Lattice-Based model to value the Company's stock options for the Algar Options due to market and performance conditions. See Note 7 - Share Based Compensation. Using these option pricing models, the fair value of each stock option award is estimated on the date of grant. Additionally, the fair value of the Algar Options is estimated at the end of each quarter for two of the tranches due to ongoing performance conditions. For the first two tranches, the performance conditions were met. There are two significant inputs into the stock option pricing models: expected volatility and expected term. The Company estimates expected volatility based on volatility of the Company's stock over a term equal to the expected term of the option granted. The expected term of stock option awards granted is derived from historical exercise experience under the Company's stock option plans and represents the period of time that stock option grants are expected to be outstanding. The expected term assumption incorporates the contractual term of an option grant, as well as the vesting period of an award. The risk-free interest rate is based on the implied yield on a U.S. Treasury constant maturity with a remaining term equal to the expected term of the option granted. The assumptions used in calculating the fair value of stock-based payment awards represent management's best estimates, but these estimates involve inherent uncertainties and the application of management's judgment. As a result, if factors change and different assumptions are used, stock-based compensation expense could be materially different in the future. In addition, the Company is required to estimate the expected forfeiture rate, and only recognize expense for those shares expected to vest. If the actual forfeiture rate is materially different from the estimate, the stock-based compensation expense could be significantly different from what was recorded in the current period. Treasury shares or new shares are issued for exercised options. The Company does not expect to repurchase any additional shares within the following annual period to accommodate the exercise of outstanding stock options. Under the LTIP, the Company may grant any of these types of awards: non-qualified and incentive stock options; stock appreciation rights; and other stock awards including stock units, restricted stock units, performance shares, performance units and restricted stock. The performance goals that the Company may use for such awards will be based on any one or more of the following performance measures: cash flow; earnings; earnings per share; market value added or economic value added; profits; return on assets; return on equity; return on investment; revenues; stock price; or total shareholder return. The LTIP is administered by a committee selected by the Board consisting of two or more outside members of the Board. The Committee may grant one or more awards to our employees, including our officers, our directors and consultants, and will determine the specific employees who will receive awards under the plan and the type and amount of any such awards. A participant who receives shares of stock awarded under the plan must hold those shares for six months before the participant may dispose of such shares.
Subsequent Events	Subsequent Events The Company has evaluated the period from March 31, 2016 through the date the financial statements herein were issued for subsequent events requiring recognition or disclosure in the financial statements and identified the following: On April 1, 2016, the Company entered Amendment No. 1 to the Waste Services Segment Asset Purchase Agreement which extended the deadline for the Company to provide written notice if the Company objected to Compactor Rental’s calculation of the Holdback. On April 15, 2016, the Company entered into Amendment No. 2 to the Asset Purchase Agreement whereby the Company and Compactor Rentals agreed that the Holdback would be retained by Compactor Rentals based on a mutually-agreed upon calculation of working capital. Amendment No. 2 also detailed the parties’ agreement of the following: no indemnification claims would be made by Compactor Rentals arising out of certain matters; certain Compactor Rentals’ representatives did not have knowledge of any additional indemnification claims as of April 15, 2016; and the transition services agreement between the parties would be extended at no cost to Compactor Rentals through March 31, 2017. Effective May 1, 2016, the Company entered into an amendment to the Crane Lease, as defined in Note 4 - Lease Commitments, whereby the lease is extended through April 30, 2021. Payments will be $14.5 thousand per month for the first twelve months following the amendment date, followed by monthly payments of $31.3 thousand thereafter for the remainder of the lease term.
Impact of Recently Issued Accounting Standards	Impact of Recently Issued Accounting Standards In May 2014, the FASB issued ASU 2014-09, Revenue from Contracts with Customers (Topic 606). The amendments in ASU 2014-09 affect any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets unless those contracts are within the scope of other standards (e.g., insurance contracts or lease contracts). The core principle of the guidance is that an entity should recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The amendments are effective for annual reporting periods beginning after December 15, 2017, including interim periods within that reporting period. Early application is not permitted. The Company has not yet assessed the impact of the adoption of ASU 2014-09 on our Condensed Consolidated Financial Statements. In August 2014, the FASB issued ASU No. 2014-15, Presentation of Financial Statements-Going Concern (Subtopic 205-40). The amendments in ASU 2014-15 are intended to define management’s responsibility to evaluate whether there is substantial doubt about an organization’s ability to continue as a going concern and to provide related footnote disclosures. The amendments are effective for annual periods ending after December 15, 2016, including interim periods within that reporting period. Early application is permitted for annual or interim reporting periods for which the financial statements have not previously been issued. The Company adopted ASU 2014-15 in the first quarter of 2016 and noted no impact from the adoption on its Condensed Consolidated Financial Statements. In April 2015, the FASB issued ASU 2015-03, Interest-Imputation of Interest: Simplifying the Presentation of Debt Issuance Costs. The guidance requires an entity to present debt issuance costs in the balance sheet as a direct reduction from the carrying amount of the debt liability, consistent with debt discounts, rather than as an asset. Amortization of debt issuance costs will continue to be reported as interest expense. Debt issuance costs related to revolving credit arrangements, however, will continue to be presented as an asset and amortized ratably over the term of the arrangement. ASU 2015-03 is effective for reporting periods beginning after December 15, 2015 including interim periods within those annual periods. Early application is permitted, and upon adoption, ASU 2015-03 should be applied on a retrospective basis. The Company adopted ASU 2015-03 in the first quarter of 2016 and presented debt issuance costs related to a revolving credit arrangement as an asset and will amortize ratably over the term of the arrangement. In July 2015, the FASB issued ASU 2015-11, Inventory, which simplifies the measurement principle of inventories valued under the First-In, First-Out ("FIFO") or weighted average methods from the lower of cost or market to the lower of cost and net realizable value. ASU 2015-11 is effective for reporting periods beginning after December 15, 2016 including interim periods within those annual periods. The Company does not expect the standard to have a material impact on our Condensed Consolidated Financial Statements. In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes, which requires that deferred tax assets and liabilities be classified as noncurrent on the consolidated balance sheet. ASU 2015-17 is effective for annual periods beginning after December 15, 2016, including interim periods within those annual periods. Early adoption is permitted as of the beginning of an interim or annual reporting period. Upon adoption, ASU 2015-17 may be applied either prospectively or retrospectively. The Company does not expect the adoption of this guidance to have a material impact on our Condensed Consolidated Financial Statements. In February 2016, the FASB issued ASU No. 2016-02, Leases, to improve financial reporting about leasing transactions. This ASU will require organizations that lease assets (“lessees”) to recognize a lease liability and a right-of-use asset on its balance sheet for all leases with terms of more than twelve months. A lease liability is a lessee’s obligation to make lease payments arising from a lease, measured on a discounted basis and a right-of-use asset represents the lessee’s right to use, or control use of, a specified asset for the lease term. The amendments in this ASU simplify the accounting for sale and leaseback transactions primarily because lessees must recognize lease assets and lease liabilities. This ASU leaves the accounting for the organizations that own the assets leased to the lessee (“lessor”) largely unchanged except for targeted improvements to align it with the lessee accounting model and Topic 606, Revenue from Contracts with Customers. The amendments in ASU 2016-02 are effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. Lessees (for capital and operating leases) and lessors (for sales-type, direct financing, and operating leases) must apply a modified retrospective transition approach for leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements. The modified retrospective approach would not require any transition accounting for leases that expired before the earliest comparative period presented. Lessees and lessors may not apply a full retrospective transition approach. The Company is evaluating the potential impact of ASU 2016-02 on its Condensed Consolidated Financial Statements.