Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Notes)	9 Months Ended
	Oct. 31, 2016	Oct. 31, 2015
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES As described in Note 1 Summary of Significant Accounting Policies of the Company's Annual Report on Form 10-K/A for the fiscal year ended January 31, 2016, the Company assesses the recoverability of long-lived and intangible assets using fair value measurement techniques if events or changes in circumstances indicate that an asset might be impaired. An impairment loss is recognized when the carrying amount of an asset is below the estimated undiscounted cash flows associated with the asset group which contains the long-lived and intangible assets being assessed. The cash flows used for this analysis are similar to those used in the goodwill impairment assessment discussed further below. However, the cash flows are undiscounted and are projected over the life of the "primary asset" within the asset group being assessed. As also described in Note 1 Summary of Significant Accounting Policies of the Company's Annual Report on Form 10-K/A for the fiscal year ended January 31, 2016, the Company recognizes goodwill as the excess cost of an acquired business over the net amount assigned to assets acquired and liabilities assumed. Management assesses goodwill for impairment annually during the fourth quarter and between annual tests whenever a triggering event indicates there may be an impairment. Impairment tests of goodwill are done at the reporting unit level. When performing goodwill impairment testing, the fair values of reporting units are determined based on valuation techniques using the best available information, primarily discounted cash flow projections. Such valuations are derived from valuation techniques in which one or more significant inputs are not observable (Level 3 fair value measures). Based on the Company’s review of its Engineered Films and Applied Technology Division reporting units, the Company identified no indicators of impairment for these reporting units or asset groups, and as such no further impairment analysis was required under the applicable accounting guidance for the three- or nine-month periods ended October 31, 2016. Aerostar Reporting Unit (related to October 31, 2016) In the fiscal 2017 third quarter the Company determined that a triggering event occurred for its Aerostar reporting unit and the aerostat and stratospheric programs (Lighter than Air) and radar product and radar services (Radar) asset groups. Financial expectations for net sales and operating income of the reporting unit and affected asset groups were lowered due to delays and uncertainties regarding the reporting unit’s pursuits of certain opportunities, in particular aerostat orders, certain classified stratospheric balloon pursuits, and radar pursuits. Aerostar is still actively pursuing these opportunities and some are in active negotiations, but the timing of certain stratospheric balloon and aerostat opportunities are being delayed more than previously expected and the likelihood of radar sales is lower due to the Company's decision to no longer actively pursue certain radar product opportunities. As a result of these factors, the Company lowered its financial forecast for the business and performed a Step 1 impairment analysis using fair value techniques as of October 31, 2016 for both goodwill and long-lived assets. As described in Note 6 Goodwill, Long-Lived Assets and Other Charges, the Company concluded that the Aerostar reporting unit goodwill balance was not impaired but certain long-lived assets associated with the previously impaired Radar asset group, including property, plant, and equipment and patents, were further impaired as of October 31, 2016. Vista Reporting Unit (related to October 31, 2015) As described in our Annual Report on Form 10-K/A for the fiscal year ended January 31, 2016, the Company determined that a triggering event occurred for its Vista reporting unit, a subsidiary of the Aerostar Division, during the fiscal 2016 third quarter. Accordingly, the Company performed a Step 1 impairment analysis using fair value techniques as of October 31, 2015 for both goodwill and long-lived assets. As described in Note 6 Goodwill, Long-Lived Assets and Other Charges, the Company concluded that the Vista goodwill balance was fully impaired and that certain long-lived assets of the Vista reporting unit, including finite-lived intangible assets, were impaired as of October 31, 2015. There have been no material changes to the Company's significant accounting policies as described in the Company's Annual Report on Form 10-K/A for the fiscal year ended January 31, 2016.
Goodwill and Intangible Assets, Policy	As described in Note 1 Summary of Significant Accounting Policies of the Company's Annual Report on Form 10-K/A for the fiscal year ended January 31, 2016, the Company assesses the recoverability of long-lived and intangible assets using fair value measurement techniques if events or changes in circumstances indicate that an asset might be impaired. An impairment loss is recognized when the carrying amount of an asset is below the estimated undiscounted cash flows associated with the asset group which contains the long-lived and intangible assets being assessed. The cash flows used for this analysis are similar to those used in the goodwill impairment assessment discussed further below. However, the cash flows are undiscounted and are projected over the life of the "primary asset" within the asset group being assessed. As also described in Note 1 Summary of Significant Accounting Policies of the Company's Annual Report on Form 10-K/A for the fiscal year ended January 31, 2016, the Company recognizes goodwill as the excess cost of an acquired business over the net amount assigned to assets acquired and liabilities assumed. Management assesses goodwill for impairment annually during the fourth quarter and between annual tests whenever a triggering event indicates there may be an impairment. Impairment tests of goodwill are done at the reporting unit level. When performing goodwill impairment testing, the fair values of reporting units are determined based on valuation techniques using the best available information, primarily discounted cash flow projections. Such valuations are derived from valuation techniques in which one or more significant inputs are not observable (Level 3 fair value measures). Based on the Company’s review of its Engineered Films and Applied Technology Division reporting units, the Company identified no indicators of impairment for these reporting units or asset groups, and as such no further impairment analysis was required under the applicable accounting guidance for the three- or nine-month periods ended October 31, 2016. Aerostar Reporting Unit (related to October 31, 2016) In the fiscal 2017 third quarter the Company determined that a triggering event occurred for its Aerostar reporting unit and the aerostat and stratospheric programs (Lighter than Air) and radar product and radar services (Radar) asset groups. Financial expectations for net sales and operating income of the reporting unit and affected asset groups were lowered due to delays and uncertainties regarding the reporting unit’s pursuits of certain opportunities, in particular aerostat orders, certain classified stratospheric balloon pursuits, and radar pursuits. Aerostar is still actively pursuing these opportunities and some are in active negotiations, but the timing of certain stratospheric balloon and aerostat opportunities are being delayed more than previously expected and the likelihood of radar sales is lower due to the Company's decision to no longer actively pursue certain radar product opportunities. As a result of these factors, the Company lowered its financial forecast for the business and performed a Step 1 impairment analysis using fair value techniques as of October 31, 2016 for both goodwill and long-lived assets. As described in Note 6 Goodwill, Long-Lived Assets and Other Charges, the Company concluded that the Aerostar reporting unit goodwill balance was not impaired but certain long-lived assets associated with the previously impaired Radar asset group, including property, plant, and equipment and patents, were further impaired as of October 31, 2016.	Vista Reporting Unit (related to October 31, 2015) As described in our Annual Report on Form 10-K/A for the fiscal year ended January 31, 2016, the Company determined that a triggering event occurred for its Vista reporting unit, a subsidiary of the Aerostar Division, during the fiscal 2016 third quarter. Accordingly, the Company performed a Step 1 impairment analysis using fair value techniques as of October 31, 2015 for both goodwill and long-lived assets. As described in Note 6 Goodwill, Long-Lived Assets and Other Charges, the Company concluded that the Vista goodwill balance was fully impaired and that certain long-lived assets of the Vista reporting unit, including finite-lived intangible assets, were impaired as of October 31, 2015.