Notes Payable - Additional Information (Detail) (USD $)	9 Months Ended			0 Months Ended			0 Months Ended	9 Months Ended	0 Months Ended		0 Months Ended			9 Months Ended
	Sep. 30, 2014	Sep. 30, 2014 Amended and Restated Loan Agreement [Member]	Sep. 26, 2014 Amended and Restated Loan Agreement [Member]	Sep. 26, 2014 Amended and Restated Loan Agreement [Member] Surgi Bot [Member]	Sep. 26, 2014 Amended and Restated Loan Agreement [Member] First Tranche [Member] Minimum [Member]	Sep. 26, 2014 Amended and Restated Loan Agreement [Member] First Tranche [Member] Maximum [Member]	Sep. 26, 2014 Amended and Restated Loan Agreement [Member] Second Tranche [Member]	Sep. 30, 2014 Amended and Restated Loan Agreement [Member] Second Tranche [Member] Minimum [Member]	Sep. 26, 2014 Amended and Restated Loan Agreement [Member] Third Tranche [Member]	Sep. 26, 2014 Amended and Restated Loan Agreement [Member] Third Tranche [Member] Minimum [Member]	Sep. 26, 2014 Amended and Restated Loan Agreement [Member] Without Interest Only Extension [Member]	Sep. 26, 2014 Amended and Restated Loan Agreement [Member] With Interest Only Extension [Member]	Sep. 30, 2014 Libor [Member]	Sep. 30, 2014 Loan and Security Agreement [Member]	Sep. 26, 2014 Loan and Security Agreement [Member]	Sep. 30, 2014 Loan and Security Agreement [Member] Without Interest Only Extension [Member]	Sep. 30, 2014 Loan and Security Agreement [Member] With Interest Only Extension [Member]	Sep. 30, 2014 Loan and Security Agreement [Member] Term A Loan [Member]	Sep. 30, 2014 Loan and Security Agreement [Member] Term B Loan [Member]
Debt Instrument [Line Items]
Note issuance date														Jan. 17, 2012
Issuance of promissory note as part of merger transaction														$ 10,000,000				$ 4,000,000	$ 6,000,000
Maturity date														Jan. 01, 2016
Term loan fixed interest rate													7.50%	8.75%
Outstanding principal amount of the original loan agreement															5,603,646
Term loan aggregate principal amount			25,000,000
Amount of borrowing under agreement					5,603,646	10,000,000	5,000,000			10,000,000
Amount of equity securities offering								35,000,000
Borrowing agreement expiration date							1 year		2 years
Trailing six-month revenues recognition				10,000,000
Maturity date of the term loans											Apr. 01, 2018	Oct. 01, 2018
Period of interest description		The Company is entitled to make interest-only payments for 12 months, which interest-only period is extended to 18 months if the Company receives 510(k) clearance for its SurgiBot system at any time before October 31, 2015.
Notice period for repayment of term loan														10 days
Final payment fee percentage																5.45%	6.75%
Debt instrument, basis spread on variable rate														5.00%
Debt instrument, accrued interest percentage		3.33%
Debt instrument, facility fee amount	75,000	75,000
Warrants expire in years	7 years
Approximated Amount of debt discount	129,000
Fair value of warrants on the issue date	54,000
Debt instrument,Legal fees	$ 17,000