Organization and Description of Business - Additional Information (Detail)				3 Months Ended	6 Months Ended
	Jan. 01, 2017 USD ($)	Jun. 15, 2016 USD ($) shares	Apr. 14, 2016 USD ($) Employee $ / shares shares	Jun. 30, 2016 USD ($)	Jun. 30, 2016 USD ($) Segment	Jun. 30, 2015 USD ($)	Mar. 31, 2017 USD ($)	Jun. 16, 2016 shares	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Schedule of Capitalization, Equity [Line Items]
Number of reportable segments | Segment					2
Cash and cash equivalents				$ 17,144,000	$ 17,144,000	$ 36,894,000			$ 29,888,000	$ 36,431,000
Debt outstanding under debt and capital lease obligations				28,200,000	28,200,000
Accumulated deficit				193,305,000	193,305,000				$ 173,082,000
Business acquisition deferred payment consideration				5,700,000	$ 5,700,000	0
Common stock shares issued under private placement offer | shares			591,860
Securities purchase agreement private placement units description					On April 14, 2016, the Company completed a Private Placement transaction for the offering of 591,860 Units. Each Unit was comprised of: (i) one share of Common Stock, (ii) five shares of Series A Preferred, and (iii) three warrants, each to purchase one share of Common Stock. The purchase price was $23.94 per Unit (the equivalent of $3.99 per share of Common Stock, assuming conversion of the Series A Preferred).
Private placement offer price per share | $ / shares			$ 23.94
Proceeds from issuance of private placement offer			$ 14,200,000		$ 20,619,000	$ 0
Medicare [Member]
Schedule of Capitalization, Equity [Line Items]
Reimbursement revenue				$ 2,821
Scenario Forecast [Member] | Medicare [Member]
Schedule of Capitalization, Equity [Line Items]
Reimbursement revenue	$ 732
Series A Preferred Stock
Schedule of Capitalization, Equity [Line Items]
Proceeds from issuance of private placement offer			$ 9,300,000		$ 5,300,000
Convertible preferred stock shares issued upon conversion | shares								1
Private Placement [Member]
Schedule of Capitalization, Equity [Line Items]
Common stock shares issued under private placement offer | shares		334,169	591,860
Securities purchase agreement private placement units description					On April 14, 2016, the Company completed the sale of 591,860 units (“Units”) to certain accredited investors (the “Private Placement”) at a purchase price of $23.94 per Unit. Each Unit was comprised of (i) one share of the Company’s common stock, (ii) five shares of Series A Mandatorily Convertible Preferred Stock (“Series A Preferred”), and (iii) three warrants, each to purchase one share of the Company’s common stock.
Private placement offer price per share | $ / shares			$ 23.94
Proceeds from issuance of private placement offer		$ 8,000,000	$ 14,200,000
Placement fees			1,100,000
Other offering expenses			$ 97,000
Private Placement [Member] | Series A Preferred Stock
Schedule of Capitalization, Equity [Line Items]
Convertible preferred stock shares issued upon conversion | shares			1
Allenex [Member]
Schedule of Capitalization, Equity [Line Items]
Percentage of share acquired			98.30%
Number of employees | Employee			58
Total purchase price combination of cash and common stock			$ 34,100,000
Cash distribution to acquire business, gross			$ 26,900,000
Common stock, shares issue | shares			1,375,029
Common stock value			$ 7,200,000
Business acquisition deferred payment consideration			5,700,000
Escrow deposit			8,000,000
Majority Shareholder [Member] | Allenex [Member]
Schedule of Capitalization, Equity [Line Items]
Escrow deposit			$ 8,000,000
Majority Shareholder [Member] | Allenex [Member] | Scenario Forecast [Member]
Schedule of Capitalization, Equity [Line Items]
Business acquisition deferred payment consideration							$ 5,700,000
Maximum [Member] | Allenex [Member]
Schedule of Capitalization, Equity [Line Items]
Business Acquisition Deferred Payment Date					Mar. 31, 2017