Commitments and Contingencies	3 Months Ended
Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies In July 2017, the Company received notification of a claim related to a quality dispute with a vendor alleging that the Company owed payment for future non-cancelable order quantities. The Company believes it is probable that a partial settlement of this claim will occur and recorded $196 thousand liability related to this matter within the accrued liabilities on the consolidated balance sheet as of December 31, 2017. This amount remains outstanding as of March 31, 2018. In December 2013, the Company submitted a disclosure letter to the Office of the Inspector General of the Department of Defense advising that it might not have been eligible for certain contracts it was awarded under the Small Business Innovation Research ("SBIR") Program, notwithstanding its prior representations that the Company was eligible. The matter was referred to the Small Business Administration and the US Department of Justice ("DOJ") for investigation of potential violations of the False Claims Act. A liability of $420 thousand was accrued at December 31, 2014. In March 2015, a civil settlement agreement related to the SBIR matter was signed for the same amount. The full amount was paid in 2017. In October 2014, the Company received a request for information related to the SBIR matter from the U.S. Attorney’s Office, Criminal Division. The Company provided documentation and an explanation of why a criminal investigation was unwarranted. In March 2015, the Company received an additional request, to which it also responded. Although the Company is unable to predict the final outcome of this matter, it intends to vigorously defend against any future claims. The Company becomes involved in various legal proceedings and claims incidental to normal business activities. As of March 31, 2018, the Company believes these matters will not have a material adverse effect on the consolidated financial statements.

Commitments and Contingencies

In July 2017, the Company received notification of a claim related to a quality dispute with a vendor alleging that the Company owed payment for future non-cancelable order quantities. The Company believes it is probable that a partial settlement of this claim will occur and recorded $196 thousand liability related to this matter within the accrued liabilities on the consolidated balance sheet as of December 31, 2017. This amount remains outstanding as of March 31, 2018.

In December 2013, the Company submitted a disclosure letter to the Office of the Inspector General of the Department of Defense advising that it might not have been eligible for certain contracts it was awarded under the Small Business Innovation Research ("SBIR") Program, notwithstanding its prior representations that the Company was eligible. The matter was referred to the Small Business Administration and the US Department of Justice ("DOJ") for investigation of potential violations of the False Claims Act. A liability of $420 thousand was accrued at December 31, 2014. In March 2015, a civil settlement agreement related to the SBIR matter was signed for the same amount. The full amount was paid in 2017. In October 2014, the Company received a request for information related to the SBIR matter from the U.S. Attorney’s Office, Criminal Division. The Company provided documentation and an explanation of why a criminal investigation was unwarranted. In March 2015, the Company received an additional request, to which it also responded. Although the Company is unable to predict the final outcome of this matter, it intends to vigorously defend against any future claims.

The Company becomes involved in various legal proceedings and claims incidental to normal business activities. As of March 31, 2018, the Company believes these matters will not have a material adverse effect on the consolidated financial statements.