Number of directors eligible under the plan.

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Proceeds from issuance of common stock gross.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Number of shares of equity interests issued or issuable to acquire entity.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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The cash inflow from the additional capital contribution to the entity.

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The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Price of a single share of a number of saleable stocks of a company.

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Number of new stock issued during the period.

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Total number of shares issued during the period, including shares forfeited, as a result of Restricted Stock Awards.

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Equity Transactions - Additional Information (Detail)						1 Months Ended		12 Months Ended
Equity Transactions - Additional Information (Detail)	Dec. 30, 2015 shares	Jun. 16, 2015 USD ($) Director $ / shares shares	Apr. 16, 2015 USD ($) Director $ / shares shares	Oct. 27, 2014 USD ($) $ / shares shares	Apr. 15, 2014 USD ($) Director $ / shares shares	Aug. 31, 2014 USD ($) $ / shares shares	Mar. 31, 2013 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Dec. 31, 2014 USD ($) $ / shares shares	Dec. 31, 2013 USD ($)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Sale of Common stock \| shares						8,050,000	3,322,500
Share price \| $ / shares						$ 4.60	$ 3.00
Gross proceeds						$ 37,000,000	$ 10,000,000
Net proceeds from public offering						34,300,000	9,200,000		$ 34,254,000	$ 9,018,000
Underwriting fees and offering costs						$ 2,700,000	$ 800,000
Restricted Stock [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of directors \| Director		2	4
Restricted stock granted \| shares					125,000			11,440	138,500
Fair market value restricted stock					$ 381,250
Restricted stock price per share \| $ / shares					$ 3.05			$ 5.08	$ 3.07
Stock compensation expense								$ 127,000	$ 91,000
Restricted Stock [Member] \| Director One [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock granted \| shares		1,560	2,080
Fair market value restricted stock		$ 9,079	$ 10,025
Restricted stock price per share \| $ / shares		$ 5.82	$ 4.82
Restricted Stock [Member] \| Director Two [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock granted \| shares		1,560	2,080
Fair market value restricted stock		$ 9,079	$ 10,025
Restricted stock price per share \| $ / shares		$ 5.82	$ 4.82
Restricted Stock [Member] \| Director Three [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock granted \| shares			2,080
Fair market value restricted stock			$ 10,025
Restricted stock price per share \| $ / shares			$ 4.82
Restricted Stock [Member] \| Director Four [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock granted \| shares			2,080
Fair market value restricted stock			$ 10,025
Restricted stock price per share \| $ / shares			$ 4.82
Restricted Stock [Member] \| Independent Directors [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Number of directors \| Director					4
Restricted stock granted \| shares					3,000
Fair market value restricted stock					$ 9,150
Restricted stock price per share \| $ / shares					$ 3.05
Stock compensation expense									36,000
Restricted Stock Issued \| shares					12,000
Restricted Stock [Member] \| Director [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Restricted stock granted \| shares				1,500
Fair market value restricted stock				$ 7,365
Restricted stock price per share \| $ / shares				$ 4.91
Stock compensation expense									$ 2,000
Clarient, Inc. [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Business acquisition, purchase price payment in share \| shares	15,000,000