STOCKHOLDERS' EQUITY - Prepaid Asset Using Grant-Date-Fair Value (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance		Total 2016 issuances		Total 2015 issuances		Total 2014 issuances
Stock Issued During Period, Shares, Share-based Compensation, Gross		110,629		58,479		181,077
Stock Issued During Period, Value, Share-based Compensation, Gross		$ 686	[1]	$ 359	[2]	$ 1,071
New Director of Sales and Marketing [Member] | Vested Restricted Common Stock Two [Member] | Sign-on Bonus [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance				January 2015
Stock Issued During Period, Shares, Share-based Compensation, Gross				17,655
Stock Issued During Period, Value, Share-based Compensation, Gross				$ 125
Consultants [Member] | Vested Restricted Common Stock Three [Member] | Compensation For Strategic Investor Marketing Services [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance				March 2015
Stock Issued During Period, Shares, Share-based Compensation, Gross				10,000
Stock Issued During Period, Value, Share-based Compensation, Gross				$ 63
Former Employee [Member] | Common Stock One [Member] | Cashless stock option exercise [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance				April, August 2015
Stock Issued During Period, Shares, Share-based Compensation, Gross				122
Stock Issued During Period, Value, Share-based Compensation, Gross	[3]			$ 0
Employee [Member] | Vested Restricted Common Stock Four [Member] | Approved Bonus [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance				May, June, July 2015
Stock Issued During Period, Shares, Share-based Compensation, Gross				14,404
Stock Issued During Period, Value, Share-based Compensation, Gross				$ 72
Related Party - James McKenzie [Member] | Common Stock One [Member] | Pursuant To Royalty Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance		January, March, September, and December 2016
Stock Issued During Period, Shares, Share-based Compensation, Gross		6,275
Stock Issued During Period, Value, Share-based Compensation, Gross		$ 38
Related Party - James McKenzie [Member] | Common Stock Two [Member] | Pursuant To Royalty Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance				July 2015
Stock Issued During Period, Shares, Share-based Compensation, Gross				4,070
Stock Issued During Period, Value, Share-based Compensation, Gross				$ 22
Related Party - James McKenzie [Member] | Common Stock Three [Member] | Pursuant To Royalty Agreement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance						March and December 2014
Stock Issued During Period, Shares, Share-based Compensation, Gross						4,555
Stock Issued During Period, Value, Share-based Compensation, Gross						$ 31
Director [Member] | Vested Restricted Common Stock One [Member] | Director Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance				January, June, August, November 2015
Stock Issued During Period, Shares, Share-based Compensation, Gross				12,228
Stock Issued During Period, Value, Share-based Compensation, Gross				$ 77
Director [Member] | Common Stock Six [Member] | Director Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance						December 2014
Stock Issued During Period, Shares, Share-based Compensation, Gross						1,248
Stock Issued During Period, Value, Share-based Compensation, Gross						$ 10
Three employees, One Officer and One Former Director [Member] | Common Stock One [Member] | Cashless stock option exercise [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance						January, February, March, April and November 2014
Stock Issued During Period, Shares, Share-based Compensation, Gross						31,850
Stock Issued During Period, Value, Share-based Compensation, Gross	[3]					$ 0
Four Consultants Including Former Board Member [Member] | Common Stock Two [Member] | Consideration for Services [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance						February, March, August and December 2014
Stock Issued During Period, Shares, Share-based Compensation, Gross	[4]					131,365
Stock Issued During Period, Value, Share-based Compensation, Gross						$ 932
Related party, Director at Orbital [Member] | Common Stock Four [Member] | Bonus [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance						June 2014
Stock Issued During Period, Shares, Share-based Compensation, Gross						5,624
Stock Issued During Period, Value, Share-based Compensation, Gross						$ 50
3 Directors [Member] | Common Stock Five [Member] | Director Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance						August 2014
Stock Issued During Period, Shares, Share-based Compensation, Gross						6,435
Stock Issued During Period, Value, Share-based Compensation, Gross						$ 48
Five Board [Member] | Vested Restricted Common Stock One [Member] | Director Compensation [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance		January, April, July and October 2016
Stock Issued During Period, Shares, Share-based Compensation, Gross		46,854
Stock Issued During Period, Value, Share-based Compensation, Gross	[5]	$ 267
Four Employee [Member] | Vested Restricted Common Stock Two [Member] | Approved Bonus [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance		January and July 2016
Stock Issued During Period, Shares, Share-based Compensation, Gross		56,782
Stock Issued During Period, Value, Share-based Compensation, Gross	[6]	$ 381
Three Employee [Member] | Common Stock Two [Member] | Cashless stock option exercise [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Date Of Issuance		February and April 2016
Stock Issued During Period, Shares, Share-based Compensation, Gross		718
Stock Issued During Period, Value, Share-based Compensation, Gross	[3]	$ 0

[1] Does not include stock expense of $176 thousand included in accrued liabilities at December 31, 2016.

[2] There was $404 thousand of stock-based expense related to employee stock-based bonuses and vested restricted stock units held by a Director that were earned in 2015 but not issued until the first quarter of 2016.

[3] The Company received $0 for the issuance in the cashless option exercise.

[4] The second phase of this consulting agreement could result in up to an additional 150,000 shares of common stock being granted subject to sales related performance criteria being achieved. At December 31, 2016, those criteria have not been achieved and no shares have been granted for the second phase of the agreement.

[5] Includes $38 thousand of stock-based expense related to 2015 director fees accrued and expensed in the fourth quarter of 2015.

[6] Bonuses of $366 thousand were accrued and expensed in the fourth quarter of 2015