Significant Estimates and Assumptions	3 Months Ended
Mar. 31, 2014
Significant Estimates and Assumptions [Abstract]
Significant Estimates and Assumptions	Significant Estimates and Assumptions The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of sales and expenses during the reporting periods. As described in the Company's annual report on Form 10-K, the most significant estimates and assumptions by management affect the Company’s revenue recognition, valuation of accounts receivable, valuation of inventory, assumptions used to determine fair value of goodwill and intangible assets, deferred tax assets and related valuation allowance, stock-based compensation, warranty and accounting for contingencies. The Company has reviewed these estimates and determined that these, as well as the additional revenue recognition discussion below, remain the most significant estimates for the quarter ended March 31, 2014. Although the Company regularly assesses these estimates, actual results could differ materially from these estimates. Changes in estimates are recorded in the period in which they become known. The Company bases its estimates on historical experience and various other assumptions that it believes to be reasonable under the circumstances. The Company has accounted for its $35,600 contract received in June 2012 from the Saudi Arabian National Guard, or SANG, to purchase TACNAV products and services under Accounting Standards Codification (ASC) 605-25, Multiple-Element Arrangements. The total contract value associated with TACNAV products is $21,200 for which the final shipments were completed in the second quarter of 2013. Revenue is recognized for these product sales after transfer of title and risk of loss after inspection occurs. The total contract value associated with all services is $14,400 which are estimated to continue into the third quarter of 2014. The contract value for the services portion of the SANG TACNAV order remaining to be performed as of March 31, 2014 is approximately $300. The revenue for these services is recognized using the percentage of completion accounting method. The Company limits the amount of revenue recognized for delivered elements to the amount that is not contingent on the future delivery of products or services, future performance obligations, or subject to customer-specific return or refund privileges.

Significant Estimates and Assumptions

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of the financial statements and the reported amounts of sales and expenses during the reporting periods. As described in the Company's annual report on Form 10-K, the most significant estimates and assumptions by management affect the Company’s revenue recognition, valuation of accounts receivable, valuation of inventory, assumptions used to determine fair value of goodwill and intangible assets, deferred tax assets and related valuation allowance, stock-based compensation, warranty and accounting for contingencies. The Company has reviewed these estimates and determined that these, as well as the additional revenue recognition discussion below, remain the most significant estimates for the quarter ended March 31, 2014.

Although the Company regularly assesses these estimates, actual results could differ materially from these estimates. Changes in estimates are recorded in the period in which they become known. The Company bases its estimates on historical experience and various other assumptions that it believes to be reasonable under the circumstances.

The Company has accounted for its $35,600 contract received in June 2012 from the Saudi Arabian National Guard, or SANG, to purchase TACNAV products and services under Accounting Standards Codification (ASC) 605-25, Multiple-Element Arrangements. The total contract value associated with TACNAV products is $21,200 for which the final shipments were completed in the second quarter of 2013. Revenue is recognized for these product sales after transfer of title and risk of loss after inspection occurs. The total contract value associated with all services is $14,400 which are estimated to continue into the third quarter of 2014. The contract value for the services portion of the SANG TACNAV order remaining to be performed as of March 31, 2014 is approximately $300. The revenue for these services is recognized using the percentage of completion accounting method. The Company limits the amount of revenue recognized for delivered elements to the amount that is not contingent on the future delivery of products or services, future performance obligations, or subject to customer-specific return or refund privileges.