Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
Dec. 31, 2016 USD ($) Client $ / shares	Dec. 31, 2015 USD ($) Client	Dec. 31, 2014 USD ($)
Schedule Of Significant Accounting Policies [Line Items]
Outsourced shipping expenses	$ 10,300,000	$ 3,600,000	$ 3,000,000
Number of clients accounted for more than 5% revenue \| Client	0	0
Minimum cost of purchases under Property and equipment	$ 1,000
Property and equipment, life	1 year
Impairment loss	$ 3,500,000	$ 0	0
Minimum threshold percentage of voting securities on acquisition for deemed liquidation event	50.00%
Maximum voting power percentage after consolidation merger or reorganization for deemed liquidation event	50.00%
Preferred stock conversion trading price \| $ / shares	$ 8.00
Convertible preferred stock, terms of conversion	conversion (Written Call Option) on the underlying shares if after three years the stock trades at $8.00 for thirty trading days, and (v) conversion (Contingent Forward) on the underlying shares automatically at the ten year anniversary of the issue date.
Accretion expense recognized period	3 years
Largest amount of tax benefit	Greater than 50%
Provision for interest or penalties related to uncertain tax positions	$ 0	$ 0	$ 0
Dividend yield (%)	0.00%	0.00%	0.00%
Current deferred tax assets	$ 1,248,900	$ 16,668,000
Deferred tax asset	$ 6,500,000
Net Revenues [Member] \| Customer Concentration Risk [Member]
Schedule Of Significant Accounting Policies [Line Items]
Percentage of revenue derived from	5.00%	5.00%
Net Revenues [Member] \| Customer Concentration Risk [Member] \| Oncology Practice Clients [Member]
Schedule Of Significant Accounting Policies [Line Items]
Percentage of revenue derived from			10.10%
Net Revenues [Member] \| Customer Concentration Risk [Member] \| Other Individual Clients [Member]
Schedule Of Significant Accounting Policies [Line Items]
Percentage of revenue derived from			10.00%
Net Revenues [Member] \| California [Member] \| Customer Concentration Risk [Member] \| Clarient, Inc. [Member]
Schedule Of Significant Accounting Policies [Line Items]
Percentage of revenue derived from	24.00%	20.20%	15.00%
Net Revenues [Member] \| Florida [Member] \| Customer Concentration Risk [Member] \| Clarient, Inc. [Member]
Schedule Of Significant Accounting Policies [Line Items]
Percentage of revenue derived from	15.00%	20.50%	25.80%

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Largest amount of tax benefit.

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Minimum threshold percentage of voting securities on acquisition for deemed liquidation event.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Specific terms relevant to convertibility. Includes class of preferred stock and number of shares convertible into, exercise (or conversion) price or rates, dates relevant to conversion timing and events relevant to conversion. Describe also any beneficial conversion features. where convertible preferred stock with a nondetachable conversion feature is in-the-money at commitment date. For contingently convertible preferred stock, discuss the circumstances of the contingency, including the events or changes in circumstance that would cause the contingency to be met and any of the significant features necessary to understand the conversion rights and the timing of those rights. Include also an events or changes in circumstance, if any, that could adjust or change the contingency, conversion price, or number of shares, including significant terms of those changes.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards classified as current.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Cost incurred during the reporting period in transporting goods and services to customers. Includes freight-out costs.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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