iCAD (ICAD) 10-Q 15 May 18 2018 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2018	May 10, 2018
Document And Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q1
Trading Symbol	ICAD
Entity Registrant Name	ICAD INC
Entity Central Index Key	749,660
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Common Stock, Shares Outstanding		16,662,993

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 8,662	$ 9,387
Trade accounts receivable, net of allowance for doubtful accounts of $142 in 2018 and $107 in 2017	7,283	8,599
Inventory, net	2,197	2,123
Prepaid expenses and other current assets	1,158	1,100
Total current assets	19,300	21,209
Property and equipment, net of accumulated depreciation of $5,985 in 2018 and $5,889 in 2017	502	576
Other assets	53	53
Intangible assets, net of accumulated amortization of $7,517 in 2018 and $7,433 in 2017	1,829	1,931
Goodwill	8,362	8,362
Total assets	30,046	32,131
Current liabilities:
Accounts payable	1,540	1,362
Accrued and other expenses	4,685	4,475
Lease payable - current portion	13	12
Notes payable - current portion	1,190	817
Deferred revenue	5,476	5,404
Total current liabilities	12,904	12,070
Other long-term liabilities	95	119
Lease payable, long-term portion	22	27
Notes payable, long-term portion	4,810	5,119
Deferred revenue, long-term portion	773	506
Deferred tax	6	14
Total liabilities	18,610	17,855
Commitments and Contingencies (Note 5, 6 and 8)
Stockholders' equity:
Preferred stock, $ .01 par value: authorized 1,000,000 shares; none issued.
Common stock, $ .01 par value: authorized 30,000,000 shares; issued 16,848,824 in 2018 and 16,711,752 in 2017; outstanding 16,662,993 in 2018 and 16,525,681 in 2017	168	167
Additional paid-in capital	217,722	217,389
Accumulated deficit	(205,039)	(201,865)
Treasury stock at cost, 185,831 shares in 2018 and 2017	(1,415)	(1,415)
Total stockholders' equity	11,436	14,276
Total liabilities and stockholders' equity	$ 30,046	$ 32,131

Condensed Consolidated Balance3

Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Statement of Financial Position [Abstract]
Allowance for doubtful accounts on trade accounts receivable	$ 142	$ 107
Property and equipment, accumulated depreciation and amortization	5,985	5,889
Intangible assets, accumulated amortization	$ 7,517	$ 7,433
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	1,000,000	1,000,000
Preferred stock, shares issued	0	0
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	30,000,000	30,000,000
Common stock, shares issued	16,848,824	16,711,752
Common stock, shares outstanding	16,662,993	16,525,681
Treasury stock, shares	185,831	185,831

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue:
Products	$ 3,014	$ 3,131
Service and supplies	3,299	3,660
Total revenue	6,313	6,791
Cost of revenue:
Products	458	420
Service and supplies	1,252	1,384
Amortization and depreciation	105	298
Total cost of revenue	1,815	2,102
Gross profit	4,498	4,689
Operating expenses:
Engineering and product development	3,339	2,574
Marketing and sales	2,166	2,902
General and administrative	2,058	2,034
Amortization and depreciation	83	122
Gain on sale of MRI assets		(2,508)
Total operating expenses	7,646	5,124
Loss from operations	(3,148)	(435)
Interest expense	(142)	(5)
Other income	22
Other expense, net	(120)	(5)
Loss before income tax expense	(3,268)	(440)
Tax expense	(13)	(17)
Net loss and comprehensive loss	$ (3,281)	$ (457)
Net loss per share:
Basic	$ (0.20)	$ (0.03)
Diluted	$ (0.20)	$ (0.03)
Weighted average number of shares used in computing loss per share:
Basic	16,583	16,135
Diluted	16,583	16,135

Condensed Consolidated Stateme5

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Cash flow from operating activities:
Net loss	$ (3,281)	$ (457)
Adjustments to reconcile net loss to net cash used for by operating activities:
Amortization	92	133
Depreciation	96	287
Bad debt provision	85	37
Inventory obsolesence reserve	(2)	13
Stock-based compensation expense	391	969
Amortization of debt discount and debt costs	64
Interest on settlement obligations		13
Deferred tax expense	(8)
Loss on disposal of assets	12
Gain on sale of MRI assets		(2,158)
Changes in operating assets and liabilities:
Accounts receivable	1,262	(433)
Inventory	(72)	238
Prepaid and other current assets	59	85
Accounts payable	177	137
Accrued expenses	186	8
Deferred revenue	298	(483)
Total adjustments	2,640	(1,154)
Net cash used for operating activities	(641)	(1,611)
Cash flow from investing activities:
Additions to patents, technology and other	(2)	(2)
Additions to property and equipment	(22)	(253)
Sale of MRI assets		2,850
Net cash (used for) provided by investing activities	(24)	2,595
Cash flow from financing activities:
Stock option exercises		19
Taxes paid related to restricted stock issuance	(57)	(45)
Principal repayment of debt financing, net	(3)
Net cash used for financing activities	(60)	(26)
(Decrease) increase in cash and equivalents	(725)	958
Cash and equivalents, beginning of period	9,387	8,585
Cash and equivalents, end of period	8,662	9,543
Supplemental disclosure of cash flow information:
Interest paid	67	3
Taxes paid	$ 23	$ 29

Basis of Presentation and Signi

Basis of Presentation and Significant Accounting Policies	3 Months Ended
	Mar. 31, 2018
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	Note 1 – Basis of Presentation and Significant Accounting Policies The accompanying condensed consolidated financial statements of iCAD, Inc. and subsidiaries (“iCAD” or the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“US GAAP”). In the opinion of management, these unaudited interim condensed consolidated financial statements reflect all adjustments, consisting of normal recurring adjustments, necessary for a fair presentation of the financial position of the Company at March 31, 2018, the results of operations of the Company for the three month period ended March 31, 2018 and 2017, and cash flows of the Company for the three month period ended March 31, 2018 and 2017. Although the Company believes that the disclosures in these financial statements are adequate to make the information presented not misleading, certain information normally included in the footnotes prepared in accordance with US GAAP has been omitted as permitted by the rules and regulations of the Securities and Exchange Commission (“SEC”). The accompanying financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2017 filed with the SEC on March 30, 2018. The results for the three month period ended March 31, 2018 are not necessarily indicative of the results that may be expected for the fiscal year ending December 31, 2018, or any future period. Segments The Company reports the results of two segments: Cancer Detection (“Detection”) and Cancer Therapy (“Therapy”). The Detection segment consists of our advanced image analysis and workflow products. The Therapy segment consists of our radiation therapy (“Axxent”) products, physics and management services, development fees, supplies, and fees for the AxxentHub software platform. Revenue Recognition Adoption of ASC Topic 606, “Revenue from Contracts with Customers” On January 1, 2018, the Company adopted the new accounting standard ASC 606, “Revenue from Contracts with Customers” and all the related amendments (Topic 606) using the modified retrospective method for all contracts not completed as of the date of adoption. For contracts that were modified before the effective date, the Company reflected the aggregate effect of all modifications when identifying performance obligations and allocating transaction price in accordance with practical expedient ASC 606-10-65-1-(f)-4, which did not have a material effect on the Company’s assessment of the cumulative effect adjustment upon adoption. The Company recognized the cumulative effect of initially applying the new standard as an adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with our historic accounting under Topic 605. A significant portion of the Company’s revenue continues to be recognized when products are shipped from manufacturing or warehousing facilities. Revenue generated from fixed fee service contracts and source agreements continues to be recognized on a straight-line basis over the term of the agreement. Revenue generated from professional service contracts entered into with customers on a time and material basis is recognized over the term of the agreement in proportion to the costs incurred in satisfying the obligations under the contract. Components of certain fixed fee service contracts are accounted for as a lease and therefore are outside the scope of Topic 606. See Note 1 for further details. We recorded a net increase to opening retained earnings of $0.1 million as of January 1, 2018 due to the cumulative impact of adopting Topic 606, with the impact primarily related to the deferral of commissions on our long-term service arrangements and warranty periods greater than one year, which previously were expensed as incurred but under the amendments to ASC 340-40 will generally be capitalized and amortized over the period of contract performance or a longer period if renewals are expected and the renewal commission is not commensurate with the initial commission. The cumulative effect of the changes made to the Company’s consolidated balance sheet for the adoption of Topic 606 were as follows (in thousands): Selected Balance Sheet Balance at Adjustments Due Balance at Assets Prepaid expenses and other current assets $ 1,100 $ 147 $ 1,247 Liabilities Deferred revenue — 409 409 Contract liabilities 5,910 (370 ) 5,540 Stockholders’ equity Accumulated deficit (201,865 ) 108 (201,973 ) In accordance with the requirements of the new standard, the disclosure of the impact of the adoption on our consolidated balance sheet and statement of operations was as follows (in thousands): As of March 31, 2018 Selected Balance Sheet As Reported Balances without Effect of Change Assets Prepaid expenses and other current assets $ 1,158 $ 996 $ (162 ) Liabilities Accrued expenses 4,685 4,685 — Deferred revenue 352 352 — Contract liabilities 5,896 5,879 (17 ) Deferred tax 6 6 — Stockholders’ equity Accumulated deficit (205,039 ) (205,184 ) (145 ) The impact to revenues for the quarter ended March 31, 2018 was a decrease of $17,000 as a result of applying Topic 606. Three months ended March 31, 2018 Selected Statement of Operations As Reported Balances without Effect of Change Revenue Products $ 3,014 $ 3,025 $ 11 Service and supplies 3,299 3,271 (28) Cost of revenue Products 458 458 — Service and supplies 1,252 1,252 — Operating expenses Marketing and sales 2,166 2,328 162 Interest expense (142 ) (142) — Other income 22 22 — Tax benefit (expense) (13 ) (13) — Net loss (3,281 ) (3,460 ) (179 ) Revenue Recognition In accordance with ASC 606, revenue is recognized when a customer obtains control of promised goods or services. The amount of revenue recognized reflects the consideration to which the Company expects to be entitled to receive in exchange for these goods or services, and excludes any sales incentives or taxes collected from customer which are subsequently remitted to government authorities. To achieve this core principle, the Company applies the following five steps: 1) Identify the contract(s) with a customer 2) Identify the performance obligations in the contract 3) Determine the transaction price 4) Allocate the transaction price to the performance obligations in the contract 5) Recognize revenue when (or as) the Company satisfies a performance obligation The Company recognizes revenue from its contracts with customers primarily from the sale of products and from the sale of services and supplies. Revenue is recognized when control of the promised goods or services is transferred to a customer, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. For product revenue, control has transferred upon shipment provided title and risk of loss have passed to the customer. Services and supplies are considered to be transferred as the services are performed or over the term of the service or supply agreement. The Company enters into contracts that can include various combinations of products and services, which are generally capable of being distinct and accounted for as separate performance obligations. The Company’s hardware is generally highly dependent on, and interrelated with, the underlying software and the software is considered essential to the functionality of the product. In these cases, the hardware and software license are accounted for as a single performance obligation and revenue is recognized at the point in time when ownership is transferred to the customer. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a customer, are excluded from revenue. Shipping and handling costs associated with outbound freight after control of a product has transferred to a customer are accounted for as fulfillment costs and are included in cost of revenue. Disaggregation of Revenue The following tables presents our revenues disaggregated by major good or service line, timing of revenue recognition, and sales channel, reconciled to our reportable segments (in thousands). Three months ended March 31, 2018 Reportable Segments Detection Therapy Total Major Goods/Service Lines Products $ 2,489 $ 1,068 $ 3,557 Service contracts 1,327 362 1,689 Supply and source usage agreements — 529 529 Professional services — 144 144 Other 54 199 253 $ 3,870 $ 2,302 $ 6,172 Timing of Revenue Recognition Goods transferred at a point in time $ 2,489 $ 1,271 $ 3,760 Services transferred over time 1,381 1,031 2,412 $ 3,870 $ 2,302 $ 6,172 Sales Channels Direct sales force $ 1,726 $ 2,041 $ 3,767 OEM partners 2,144 — 2,144 Channel partners — 261 261 $ 3,870 $ 2,302 $ 6,172 Total Revenue Revenue from contracts with customers $ 3,870 $ 2,302 $ 6,172 Revenue from lease components 141 — 141 $ 4,011 $ 2,302 $ 6,313 Three months ended March 31, 2017(1) Reportable Segments Detection Therapy Total Major Goods/Service Lines Products $ 2,667 $ 1,156 $ 3,823 Service contracts 1,476 416 1,892 Supply and source usage agreements — 469 469 Professional services — 53 53 Other 199 208 407 $ 4,342 $ 2,302 $ 6,644 Timing of Revenue Recognition Goods transferred at a point in time 2,667 1,143 $ 3,810 Services transferred over time 1,675 1,159 2,834 $ 4,342 $ 2,302 $ 6,644 Sales Channels Direct sales force $ 2,137 $ 2,141 $ 4,278 OEM partners 2,205 — 2,205 Channel partners — 161 161 $ 4,342 $ 2,302 $ 6,644 Total Revenue Revenue from contracts with customers $ 4,342 $ 2,302 $ 6,644 Revenue from lease components 147 — 147 $ 4,489 $ 2,302 $ 6,791 (1) As noted above, prior period amounts have not been adjusted under the modified retrospective method. Products. Service Contracts. Supply and Source Usage Agreements. Professional Services. Other. Significant Judgments The Company’s contracts with customers may include promises to transfer multiple products and services to a customer. Determining whether products and services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. For arrangements with multiple performance obligations, the Company allocates revenue to each performance obligation based on its relative standalone selling price. Judgment is required to determine the standalone selling price for each distinct performance obligation. The Company generally determines standalone selling prices based on the prices charged to customers and uses a range of amounts to estimate standalone selling prices when we sell each of the products and services separately and need to determine whether there is a discount that needs to be allocated based on the relative standalone selling prices of the various products and services. The Company typically has more than one range of standalone selling prices for individual products and services due to the stratification of those products and services by customers and circumstances. In these instances, the Company may use information such as the type of customer and geographic region in determining the range of standalone selling prices. The Company may provide credits or incentives to customers, which are accounted for as variable consideration when estimating the transaction price of the contract and amounts of revenue to recognize. The amount of variable consideration to include in the transaction price is estimated at contract inception using either the estimated value method or the most likely amount method based on the nature of the variable consideration. These estimates are updated at the end of each reporting period as additional information becomes available and revenue is recognized only to the extent that it is probable that a significant reversal of any amounts of variable consideration included in the transaction price will not occur. The Company provides for estimated warranty costs on original product warranties at the time of sale Contract Balances Contract liabilities are a component of deferred revenue, and Contract Assets are a component of Prepaid and other current assets. The following table provides information about receivables, contract assets, and contract liabilities from contracts with customers (in thousands). Balance at Receivables, which are included in ‘Trade accounts receivable’ $ 7,187 Contract assets, which are included in “Prepaid and other current assets” 35 Contract liabilities, which is included in “Deferred revenue” 5,896 Timing of revenue recognition may differ from timing of invoicing to customers. The Company records a receivable when revenue is recognized prior to receipt of cash payments and the Company has the unconditional right to such consideration, or unearned revenue when cash payments are received or due in advance of performance. For multi-year agreements, the Company generally invoices customers annually at the beginning of each annual service period. The opening balance of accounts receivable from contracts with customers, net of allowance for doubtful accounts, was $8.5 million as of January 1, 2018. As of March 31, 2018, accounts receivable, net of allowance for doubtful accounts, was $7.2 million. The Company will record a contract asset for unbilled revenue when the Company’s performance is in excess of amounts billed or billable. The Company has classified the contract asset balance as a component of prepaid expenses and other current assets as of January 1, 2018 and March 31, 2018. The opening balance of contract assets was $166,000 as of January 1, 2018. As of March 31, 2018, the contract asset balance was $35,000. Deferred revenue from contracts with customers is primarily composed of fees related to long-term service arrangements, which are generally billed in advance. Deferred revenue also includes payments for installation and training that has not yet completed and other offerings for which we have been paid in advance and earn the revenue when we transfer control of the product or service. Deferred revenue from contracts with customers is included in deferred revenue in the consolidated balance sheets. Deferred revenue on the consolidated balance sheet also includes $369,000 and $352,000 at December 31, 2017 and March 31, 2018, respectively of amounts associated with service contracts accounted for under Topic 840. The balance of deferred revenue at December 31, 2017 and March 31, 2018 is as follows: December 31, 2017 Contract Lease revenue Total Short term $ 5,044 $ 360 $ 5,404 Long term 497 9 506 Total $ 5,541 $ 369 $ 5,910 March 31, 2018 Contract Lease revenue Total Short term $ 5,139 $ 336 $ 5,475 Long term 757 16 773 Total $ 5,896 $ 352 $ 6,248 Changes in deferred revenue from contracts with customers were as follows (in thousands): Three Months Balance at beginning of period $ 5,541 Adoption adjustment 39 Deferral of revenue 2,668 Recognition of deferred revenue (2,352 ) Balance at end of period $ 5,896 We expect to recognize approximately $4.8 million of the deferred amount in 2018, $0.8 million in 2019, and $0.3 million thereafter. Assets Recognized from the Costs to Obtain a Contract with a Customer We recognize an asset for the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one year. We have determined that certain commissions programs meet the requirements to be capitalized. The opening balance of capitalized costs to obtain a contract was $117,000 as of January 1, 2018. As of March 31, 2018, the balance of capitalized costs to obtain a contract was $162,000. The Company has classified the capitalized costs to obtain a contract as a component of prepaid expenses and other current assets as of January 1, 2018 and March 31, 2018. Changes in the balance of capitalized costs to obtain a contract were as follows (in thousands): Three Months Balance at beginning of period $ 117 Deferral of costs to obtain a contract 84 Recognition of costs to obtain a contract (39 ) Balance at end of period $ 162 Practical Expedients and Exemptions The Company has elected to make the following accounting policy elections through the adoption of the following practical expedients: Right to Invoice Where applicable, the Company will recognize revenue from a contract with a customer in an amount that corresponds directly with the value to the customer of the Company’s performance completed to date and the amount to which the entity has a right to invoice. Sales and Other Similar Taxes The Company will exclude sales taxes and similar taxes from the measurement of transaction price and will ensure that it complies with the disclosure requirements of ASC 235-10-50-1 through 50-6. Significant Financing Component The Company will not adjust the promised amount of consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the entity transfers a promised good or service to a customer and when the customer pays for that good or service will be one year or less. Cost to Obtain a Contract The Company will recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that the Company otherwise would have recognized is one year or less and there are no renewal periods on which the Company does not pay commissions that are not commensurate with those originally paid. Promised Goods or Services that are Immaterial in the Context of a Contract The Company has elected to assess promised goods or services as performance obligations that are deemed to be immaterial in the context of a contract. As such, the Company will not aggregate and assess immaterial items at the entity level. That is, when determining whether a good or service is immaterial in the context of a contract, the assessment will be made based on the application of ASC 606 at the contract level. The Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed. Cost of Revenue Cost of revenue consists of the costs of products purchased for resale, costs relating to service including personnel costs for physicists, management services and radiation therapists, costs of service contracts to maintain equipment after the warranty period, product installation, training, customer support, certain warranty repair costs, inbound freight and duty, cost of supplies, manufacturing, warehousing, material movement, inspection, scrap, rework, amortization, depreciation and in-house product warranty repairs.

Loss per Common Share

Loss per Common Share	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Loss per Common Share	Note 2 – Loss per Common Share The Company’s basic net loss per share is computed by dividing net loss by the weighted average number of shares of common stock outstanding for the period. A summary of the Company’s calculation of net loss per share is as follows (in thousands except per share amounts): Three Months Ended 2018 2017 Net loss $ (3,281 ) $ (457 ) Shares used in the calculation of basic and diluted net loss per share 16,583 16,135 Effect of dilutive securities: Stock options — — Restricted stock — — Diluted shares used in the calculation of net loss per share 16,583 16,135 Net loss per share – basic and diluted $ (0.20 ) $ (0.03 ) The shares of the Company’s common stock issuable upon the exercise of stock options and vesting of restricted stock that were excluded from the calculation of diluted net loss per share because their effect would have been antidilutive are as follows: Period Ended March 31, 2018 2017 Stock options 1,378,258 1,440,291 Restricted stock 580,880 442,817 Stock options and restricted stock 1,959,138 1,883,108

Sale of MRI Assets

Sale of MRI Assets	3 Months Ended
	Mar. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Sale of MRI Assets	Note 3 – Sale of MRI Assets In December 2016, the Company entered into an Asset Purchase Agreement with Invivo Corporation. In accordance with the agreement, the Company sold to Invivo all right, title and interest to certain intellectual property relating to the Company’s VersaVue Software and DynaCAD product and related assets for $3.2 million. The Company closed the transaction on January 30, 2017 less a holdback reserve of $350,000 for a net of approximately $2.9 million. The holdback reserve of $350,000 has been recorded as an asset in prepaid and other current assets and will be paid to the Company within eighteen months from the closing date, less any amounts, if any, due and payable or reserved under the indemnification provisions in the Asset Purchase agreement. The Company determined the sale constituted the sale of a business in accordance with ASC 805. The Company performed an evaluation to determine if the sale constituted discontinued operations and concluded that the sale did not represent a major strategic shift, and accordingly it was not considered to be discontinued operations. In connection with the transaction, the Company allocated $394,000 of goodwill which was a component of the gain on the sale. The allocation was based on the fair value of the assets sold relative to the fair value of the Detection reporting unit as of the date of the agreement, based on the guidance from ASC 350-20-40-3. The value of the net assets sold is as follows (in thousands): Assets Accounts Receivable $ 116 Intangible assets 810 Allocated Goodwill 394 Total Assets $ 1,320 Liabilities Deferred Revenue $ 746 Total Liabilities $ 746 Net Assets Sold $ 574 In connection with the sale the Company agreed to provide certain transition services to Invivo. The fair value of the transition services were determined based on the cost to provide plus a reasonable profit margin and have been recognized as revenue over the term of approximately ninety days from the closing date. The Company recorded a gain of $2.5 million as of January 30, 2017. The components of the gain on the sale are as follows (in thousands): Gain on Sale Cash received $ 2,850 Holdback reserve 350 Fair value of transition services (118 ) Net Assets sold (574 ) Total $ 2,508

Inventory

Inventory	3 Months Ended
	Mar. 31, 2018
Inventory Disclosure [Abstract]
Inventory	Note 4 – Inventory Inventory is valued at the lower of cost or net realizable value, with cost determined by the first-in, first-out method. The Company regularly reviews inventory quantities on hand and records an allowance for excess and/or obsolete inventory primarily based upon the estimated usage of its inventory as well as other factors. Inventories consisted of the following (in thousands), which includes an inventory reserve of approximately $1.2 million as of March 31, 2018 and December 31, 2017, respectively. as of March 31, as of December Raw materials $ 993 $ 992 Work in process 133 63 Finished Goods 1,071 1,068 Inventory $ 2,197 $ 2,123

Debt Financing

Debt Financing	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Debt Financing	Note 5 – Debt financing On August 7, 2017, the Company entered into a Loan and Security Agreement, which was modified by the First Loan Modification Agreement dated March 22, 2018 (the “Loan Agreement”) with Silicon Valley Bank (the “Bank”) that provides an initial term loan facility (amounts borrowed thereunder, the “Term Loan”) of $6.0 million and a $4.0 million revolving line of credit (amounts borrowed thereunder, the “Revolving Loans”). The Company also has the option to borrow an additional $3.0 million Term Loan under the Loan Agreement, subject to meeting a Detection revenue minimum of at least $21.5 million for a trailing twelve month period ending prior to July 30, 2019. The Company will begin repayment of the first tranche of the Term Loan on September 1, 2018 in 36 equal monthly installments of principal. If the adjusted EBITDA minimum of $(750,000) for a trailing three month period ending between March 22, 2018 and July 31, 2018 (the “Adjusted EBITDA Event”) is met, the Company will begin repayment of the Term Loans beginning on March 1, 2019 in which case the Company would make 30 equal monthly installments of principal. The Company will begin repayment of the second tranche of the Term Loan on October 1, 2019 and make 30 equal monthly installments of principal. The outstanding Revolving Loans will accrue interest at a floating per annum rate equal to 1.50% above the prime rate for periods when the ratio of the Company’s unrestricted cash to the Company’s outstanding liabilities to the Bank plus the amount of the Company’s total liabilities that mature within one year is at least 1.25 to 1.0. At all other times, the interest rate shall be 0.50% above the prime rate. The outstanding Term Loans will accrue interest at a floating per annum rate equal to the prime rate. The maturity date of the Revolving Loans and the Term Loans is March 1, 2022. However, the maturity date will become April 30, 2019, April 30, 2020 or April 30, 2021 if, on or before March 15, 2019, or 2020 or 2021, as applicable, the Company does not agree in writing to the Detection revenue and adjusted EBITDA covenant levels proposed by the Bank with respect to the upcoming applicable calendar year. If the Revolving Loans are paid in full and the Loan Agreement is terminated prior to the maturity date, then the Company will pay to the Bank a termination fee in an amount equal to two percent (2.0%) of the maximum revolving line of credit. If the Company prepays the Term Loans prior to the maturity date, then the Company will pay to the Bank an amount equal to 1.0%-3.0% of the Term Loans, depending on when such Term Loans are repaid. In addition, the amended agreement specifies a final payment of 8% of the Term Loan, which was increased from 6% under the Loan Agreement. The Company is accruing the final payment as interest expense. As of March 31, 2018, the accrued final payment is approximately $66,000 and is a component of the outstanding loan balance. The Loan Agreement requires the Company to maintain minimum detection revenues during the trailing six month period ending on the last day of each calendar quarter as follows: March 31, 2018 –$8.622 million; June 30, 2018 – $8.373 million; September 30, 2018 – $8.648 million and December 31, 2018 – $9.517 million. The Loan Agreement requires the Company to maintain adjusted EBITDA during the trailing six month period ending on the last day of each calendar quarter as follows: March 31, 2018 – $(4.5 million); June 30, 2018 – $(3.75 million); September 30, 2018 – $(1 million) and December 31, 2018 – $1.00. As of March 31, 2018 the Company is in compliance with the covenants in the Loan Agreement. Obligations to the Bank under the Loan Agreement or otherwise are secured by a first priority security interest in substantially all of the assets, including intellectual property, accounts, receivables, equipment, general intangibles, inventory and investment property, and all of the proceeds and products of the foregoing, of each of the Company and Xoft, Inc. and Xoft Solutions LLC, wholly-owned subsidiaries of the Company. In connection with the Loan Agreement, the Company incurred approximately $74,000 of closing costs. In accordance with ASU 2015-03 the closing costs have been deducted from the carrying value of the debt and will be amortized over the expected term of 36 months. The current repayment schedule for the term loan is based on repayment beginning on September 1, 2018. If the Adjusted EBITDA Event occurs, the Company could elect to defer repayment until October 2019. The carrying value of the Term Loan (net of debt issuance costs) as of March 31, 2018 and December 31, 2017 is as follows (in thousands): March 31, 2018 December 31, 2017 Principal Amount of Term Loan $ 6,000 $ 6,000 Unamortized closing costs (66 ) (64 ) Accrued Final Payment 66 — Carrying amount of Term Loan 6,000 5,936 Less current portion of Term Loan (1,190 ) (817 ) Notes payable long-term portion $ 4,810 $ 5,119 Principal and interest payments are as follows (in thousands): Fiscal Year Amount Due 2018 $ 1,030 2019 2,186 2020 2,095 2021 1,660 Total $ 6,971 The following amounts are included in interest expense in our consolidated statement of operations for the three months ended March 31, 2018 and 2017 (in thousands): March 31, 2018 March 31, 2017 Cash interest expense $ 68 $ — Final Payment accrual 66 — Amortization of debt costs 7 — Amortization of settlement obligations — 13 Interest expense capital lease 1 — Capital lease – fair value amortization — (8 ) Total interest expense $ 142 $ 5

Lease Commitments

Lease Commitments	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Lease Commitments	Note 6 – Lease Commitments Operating leases Facilities are leased under operating leases expiring at various dates through March 2020. Certain of these leases contain renewal options. Rent expense under operating leases was $222,000 and $216,000 for the three months ended March 31, 2018 and 2017, respectively. Future minimum lease payments as of March 31, 2018 under operating leases are as follows: (in thousands) Fiscal Year Operating 2018 $ 575 2019 755 2020 174 Total $ 1,504 Capital leases In August 2017, the Company assumed an equipment lease obligation with payments totaling $50,000. The leases were determined to be capital leases and accordingly the equipment was capitalized and a liability of $42,000 was recorded. The equipment will be depreciated over the expected life of 3 years. Minimum lease payments are as follows (in thousands): Fiscal Year Capital 2018 $ 12 2019 17 2020 13 subtotal minimum lease obligation 42 less interest (7 ) Total, net 35 less current portion (13 ) long term portion $ 22

Stock-Based Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation	Note 7 – Stock-Based Compensation The Company follows the guidance in ASC Topic 718, “ Compensation – Stock Compensation , The Company granted options to purchase 65,331 shares of the Company’s stock in the three months ended March 31, 2018. Options granted under the Company’s stock incentive plans were valued utilizing the Black-Scholes model using the following assumptions and had the following fair values: Three Months Ended March 31, 2018 2017 Average risk-free interest rate 2.33% 1.48% Expected dividend yield None None Expected life 3.5 years 3.5 years Expected volatility 60.8% to 61.3% 70.8% to 72.0% Weighted average exercise price $3.08 $4.78 Weighted average fair value $1.40 $2.45 The Company’s stock-based compensation expense, including options and restricted stock by category is as follows (in thousands): Three Months Ended 2018 2017 Cost of revenue $ 1 $ 2 Engineering and product development 97 205 Marketing and sales — 223 General and administrative 293 539 $ 391 $ 969 As of March 31, 2018, unrecognized compensation cost (in thousands) related to unexercisable options and unvested restricted stock and the weighted average remaining period is as follows: Remaining expense $ 2,225 Weighted average term 1.2 years The Company’s restricted stock awards typically vest in either one year or three equal annual installments with the first installment vesting one year from grant date. The Company granted a total of 162,500 shares of performance based restricted stock during 2016 with performance measured on meeting a revenue target based on growth for fiscal year 2017 and vesting in three equal installments with the first installment vesting upon measurement of the goal. In addition, a maximum of 108,333 additional shares were available to be earned based on exceeding the revenue goal. On March 30, 2018, in accordance with the performance award, the Board of Directors deemed that the award had been earned and a total of 189,583 shares were granted, with 63,194 immediately vesting and the remainder vesting on the first and second anniversary of the award date. On March 22, 2018, the Company granted a total of 112,500 shares of performance based restricted stock with performance measured on meeting a revenue target based on growth for fiscal year 2018 and vesting in three equal installments with the first installment vesting upon measurement of the goal. The Company also granted a total of 112,500 shares of time based restricted stock. For the quarter, the Company granted a total of 344,094 shares of restricted stock with either time based or immediate vesting in the three months ended March 31, 2018, which includes the shares noted above. Assumptions used to determine the value of performance based grants of restricted stock include the probability of achievement of the specified revenue targets. Compensation cost for performance based restricted stock requires significant judgment regarding probability of achieving the performance objectives and compensation cost is re-measured The Company’s aggregate intrinsic value for stock options and restricted stock outstanding is as follows (in thousands): Period Ended Aggregate intrinsic value 2018 2017 Stock options $ 273 $ 1,425 Restricted stock 1,789 2,039 There were no stock options exercised during the three months ended March 31, 2018. The intrinsic value of restricted shares that vested in the three months ended March 31, 2018 was $0.5 million. The intrinsic value of restricted shares that vested in the three months ended March 31, 2017 was $0.3 million.

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 8 – Commitments and Contingencies Foreign Tax Claim In July 2007, a dissolved former Canadian subsidiary of the Company, CADx Medical Systems Inc. (“CADx Medical”), received a tax re-assessment re-assessment re-assessment Other Commitments The Company is obligated to pay approximately $1.1 million for firm purchase obligations to suppliers for future product and service deliverables. Litigation The Company is a party to various legal proceedings and claims arising out of the ordinary course of its business. Although the final results of all such matters and claims cannot be predicted with certainty, the Company currently believes that there are no current proceedings or claims pending against it the ultimate resolution of which would have a material adverse effect on its financial condition or results of operations. However, should the Company fail to prevail in any legal matter or should several legal matters be resolved against the Company in the same reporting period, such matters could have a material adverse effect on our operating results and cash flows for that particular period. In all cases, at each reporting period, the Company evaluates whether or not a potential loss amount or a potential range of loss is probable and reasonably estimable under ASC 450, Contingencies. Legal costs are expensed as incurred.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 9 – Fair Value Measurements The Company follows the provisions of ASC Topic 820, “ Fair Value Measurement and Disclosures • Level 1 – Quoted prices in active markets for identical assets or liabilities. • Level 2 – Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Our financial instruments include cash and cash equivalents, accounts receivable, accounts payable certain accrued liabilities and debt. The carrying amounts of our cash and cash equivalents (which are composed primarily of deposit and overnight sweep accounts), accounts receivable, accounts payable and certain accrued liabilities approximate fair value due to the short maturity of these instruments. The carrying value of our term loan approximates fair value due to the market rate of the stated interest rate. The Company’s assets that are measured at fair value on a recurring basis relate to the Company’s money market accounts. The Company’s money market funds are included in cash and cash equivalents in the accompanying balance sheets and are considered a Level 1 investment as they are valued at quoted market prices in active markets. The following table sets forth the Company’s assets and liabilities which are measured at fair value on a recurring basis by level within the fair value hierarchy. Fair value measurements using: (000’s) as of December 31, 2017 Level 1 Level 2 Level 3 Total Assets Money market accounts $ 8,853 $ — $ — $ 8,853 Total Assets $ 8,853 $ — $ — $ 8,853 Fair value measurements using: (000’s) as of March 31, 2018 Level 1 Level 2 Level 3 Total Assets Money market accounts $ 7,967 $ — $ — $ 7,967 Total Assets $ 7,967 $ — $ — $ 7,967

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2018
Income Tax Disclosure [Abstract]
Income Taxes	Note 10 – Income Taxes The Company recorded an income tax provision of $13,000 and $17,000 for the three months ended March 31, 2018 and 2017, respectively. At March 31, 2018, the Company had no material unrecognized tax benefits and a deferred tax liability of approximately $6,000 related to tax amortizable goodwill. The Company recorded a decrease in the deferred tax liability of approximately $8,000 through March 31, 2018. No other adjustments were required under ASC 740, “Income Taxes”. The Company does not expect that the unrecognized tax benefits will materially increase within the next 12 months. The Company did not recognize any interest or penalties related to uncertain tax positions at March 31, 2018. The Company’s estimate of the Tax Cut and Jobs Act (“TCJA”) and the remeasurement of our deferred tax assets and liabilities is subject to the finalization of the Company’s analysis related to certain matters, such as developing interpretations of the provisions of the TCJA, changes to certain estimates and the filing of the Company’s tax returns. U.S. Treasury regulations, administrative interpretations or court decisions interpreting the TCJA may require further adjustments and changes in the Company’s estimates. The final determination of the TCJA and the re-measurement of the Company’s deferred assets and liabilities will be completed as additional information becomes available, but no later than one year from the enactment of the TCJA. For the three months ended March 31, 2018, there were no changes to the Company’s analysis performed as of December 31, 2017. The Company files United States federal income tax returns and income tax returns in various states and local jurisdictions. The Company’s three preceding tax years remain subject to examination by federal and state taxing authorities. In addition, because the Company has net operating loss carry-forwards, the Internal Revenue Service and state jurisdictions are permitted to audit earlier years and propose adjustments up to the amount of net operating loss generated in those years. The Company is not currently under examination by any federal or state jurisdiction for any tax years.

Goodwill

Goodwill	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	Note 11 – Goodwill In accordance with FASB Accounting Standards Codification (“ASC”) Topic 350-20, “Intangibles – Goodwill and Other” 350-20”), Factors the Company considers important, which could trigger an impairment of such asset, include the following: • significant underperformance relative to historical or projected future operating results; • significant changes in the manner or use of the assets or the strategy for the Company’s overall business; • significant negative industry or economic trends; • significant decline in the Company’s stock price for a sustained period; and • a decline in the Company’s market capitalization below net book value. The Company records an impairment charge when such assessment indicates that the fair value of a reporting unit was less than the carrying value. In evaluating potential impairments outside of the annual measurement date, judgment is required in determining whether an event has occurred that may impair the value of goodwill or intangible assets. The Company utilizes either discounted cash flow models or other valuation models, such as comparative transactions and market multiples, to determine the fair value of reporting units. The Company makes assumptions about future cash flows, future operating plans, discount rates, comparable companies, market multiples, purchase price premiums and other factors in those models. Different assumptions and judgment determinations could yield different conclusions that would result in an impairment charge to income in the period that such change or determination was made. In January 2018 the Company adopted a plan to discontinue offering radiation therapy professional services to practices that provide the Company’s electronic brachytherapy solution for the treatment of non-melanoma The Company elected to early adopt ASU 2017-04, 2017-04”) 2017-04 As a result of the underperformance of the Therapy reporting unit as compared to expected future results, the Company determined there was a triggering event in the third quarter of 2017. As a result, the Company completed an interim impairment assessment. The interim test resulted in the fair value of the Therapy reporting unit being less than the carrying value of the reporting unit. The fair value of the Therapy reporting unit was $3.5 million and the carrying value was $7.5 million. The deficiency of $4.0 million was recorded as an impairment charge in the third quarter ended September 30, 2017. The Company did not identify a triggering event within the Detection reporting unit and accordingly did not perform an interim test. The Company performed the annual impairment assessment at October 1, 2017 and compared the fair value of each of reporting unit to its carrying value as of this date. Fair value exceeded the carrying value for the Detection reporting unit, and the carrying value approximated fair value of the Therapy reporting unit after the impairment as of September 30, 2017. The carrying values of the reporting units were determined based on an allocation of our assets and liabilities through specific allocation of certain assets and liabilities, to the reporting units and an apportionment of the remaining net assets based on the relative size of the reporting units’ revenues and operating expenses compared to the Company as a whole. The determination of reporting units also requires management judgment. The Company determines the fair values for each reporting unit using a weighting of the income approach and the market approach. For purposes of the income approach, fair value is determined based on the present value of estimated future cash flows, discounted at an appropriate risk adjusted rate. The Company uses internal forecasts to estimate future cash flows and includes estimates of long-term future growth rates based on our most recent views of the long-term forecast for each segment. Accordingly, actual results can differ from those assumed in our forecasts. Discount rates are derived from a capital asset pricing model and by analyzing published rates for industries relevant to our reporting units to estimate the cost of equity financing. The Company uses discount rates that are commensurate with the risks and uncertainty inherent in the respective businesses and in our internally developed forecasts. In the market approach, the Company uses a valuation technique in which values are derived based on market prices of publicly traded companies with similar operating characteristics and industries. A market approach allows for comparison to actual market transactions and multiples. It can be somewhat limited in its application because the population of potential comparable publicly-traded companies can be limited due to differing characteristics of the comparative business and ours, as well as market data may not be available for divisions within larger conglomerates or non-public The Company corroborates the total fair values of the reporting units using a market capitalization approach; however, this approach cannot be used to determine the fair value of each reporting unit value. The blend of the income approach and market approach is more closely aligned to the business profile of the Company, including markets served and products available. In addition, required rates of return, along with uncertainties inherent in the forecast of future cash flows, are reflected in the selection of the discount rate. In addition, under the blended approach, reasonably likely scenarios and associated sensitivities can be developed for alternative future states that may not be reflected in an observable market price. The Company will assess each valuation methodology based upon the relevance and availability of the data at the time the valuation is performed and weights the methodologies appropriately. A rollforward of goodwill activity by reportable segment is as follows (in thousands): Detection Therapy Total Balance at December 31, 2017 $ 8,362 $ — $ 8,362 Balance at March 31, 2018 $ 8,362 $ — $ 8,362 Accumulated Goodwill $ 699 $ 6,270 $ 54,906 Fair value allocation 7,663 13,446 — Accumulated impairment — (19,716 ) (46,544 ) Balance at March 31, 2018 $ 8,362 $ — $ 8,362

Long-lived assets

Long-lived assets	3 Months Ended
	Mar. 31, 2018
Property, Plant and Equipment [Abstract]
Long-lived assets	Note 12 – Long-lived assets In accordance with FASB ASC Topic 360, “Property, Plant and Equipment”, (“ASC 360”), the Company assesses long-lived assets for impairment if events and circumstances indicate it is more likely than not that the fair value of the asset group is less than the carrying value of the asset group. ASC 360-10-35 uses “events and circumstances” criteria to determine when, if at all, an asset (or asset group) is evaluated for recoverability. Thus, there is no set interval or frequency for recoverability evaluation. In accordance with ASC 360-10-35-21, the following factors are examples of events or changes in circumstances that indicate the carrying amount of an asset (asset group) may not be recoverable and thus is to be evaluated for recoverability. • A significant decrease in the market price of a long-lived asset (asset group); • A significant adverse change in the extent or manner in which a long-lived asset (asset group) is being used or in its physical condition; • A significant adverse change in legal factors or in the business climate that could affect the value of a long-lived asset (asset group), including an adverse action or assessment by a regulator; • An accumulation of costs significantly in excess of the amount originally expected for the acquisition or construction of a long-lived asset (asset group); • A current period operating or cash flow loss combined with a history of operating or cash flow losses or a projection or forecast that demonstrates continuing losses associated with the use of a long-lived asset (asset group). In accordance with ASC 360-10-35-17, if the carrying amount of an asset or asset group (in use or under development) is evaluated and found not to be fully recoverable (the carrying amount exceeds the estimated gross, undiscounted cash flows from use and disposition), then an impairment loss must be recognized. The impairment loss is measured as the excess of the carrying amount over the asset’s (or asset group’s) fair value. The Company determined the “Asset Group” to be the assets of the Therapy segment, which the Company considered to be the lowest level for which the identifiable cash flows were largely independent of the cash flows of other assets and liabilities. The Company completed an interim goodwill impairment assessment for the Therapy reporting unit in the third quarter of 2017 and noted that there was an impairment of goodwill. As a result, the Company determined this was a triggering event to review long-lived assets for impairment. Accordingly, the Company completed an analysis pursuant to ASC 360-10-35-17 and determined that the carrying value of the asset group exceeded the undiscounted cash flows, and that long-lived assets were impaired. The Company recorded long-lived asset impairment charges of approximately $0.7 million in the third quarter ended September 30, 2017 based on the deficiency between the book value of the assets and the fair value as determined in the analysis. The Company also completed a goodwill assessment for the fourth quarter of 2017, and in connection with that assessment, the Company completed an analysis pursuant to ASC 360-10-35-17 and determined that the undiscounted cash flows exceeded the carrying value of the asset group and that long-lived assets were not impaired. At March 31, 2018, the long-lived assets in the respective asset groups are recorded at their current fair values. The Company determined there were no triggering events in the quarter ended March 31, 2018. A considerable amount of judgment and assumptions are required in performing the impairment tests, principally in determining the fair value of the asset group and the reporting unit. While the Company believes the judgments and assumptions are reasonable, different assumptions could change the estimated fair values and, therefore additional impairment charges could be required. Significant negative industry or economic trends, disruptions to the Company’s business, loss of significant customers, inability to effectively integrate acquired businesses, unexpected significant changes or planned changes in use of the assets may adversely impact the assumptions used in the fair value estimates and ultimately result in future impairment charges.

Segment Reporting

Segment Reporting	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Segment Reporting	Note 13 – Segment Reporting In accordance with FASB Topic ASC 280, “ Segments The Company’s CODM is the CEO. Each segment generates revenue from the sale of medical equipment and related services and/or sale of supplies. The Company has determined there are two segments, Cancer Detection and Cancer Therapy. The Detection segment consists of our advanced image analysis and workflow products, and the Therapy segment consists of our radiation therapy Axxent products, and related services. The primary factors used by our CODM to allocate resources are based on revenues, gross profit, operating income, and earnings or loss before interest, taxes, depreciation, amortization, and other specific and non-recurring items (“Adjusted EBITDA”) of each segment. Included in segment operating income are stock compensation, amortization of technology and depreciation expense. There are no intersegment revenues. Our CODM does not use asset information by segment to allocate resources or make operating decisions. Segment revenues, gross profit, segment operating income or loss, and a reconciliation of segment operating income or loss to GAAP loss before income tax is as follows (in thousands): Three Months Ended 2018 2017 Segment revenues: Detection $ 4,011 $ 4,489 Therapy 2,302 2,302 Total Revenue $ 6,313 $ 6,791 Segment gross profit: Detection $ 3,529 $ 4,001 Therapy 969 688 Segment gross profit $ 4,498 $ 4,689 Segment operating income (loss): Detection $ (13 ) $ 1,502 Therapy (1,066 ) (2,383 ) Segment operating income (loss) $ (1,079 ) $ (881 ) General, administrative, depreciation and amortization expense $ (2,069 ) $ (2,062 ) Interest expense (142 ) (5 ) Gain on sale of MRI assets — 2,508 Other income 22 — Loss before income tax $ (3,268 ) $ (440 )

Recent Accounting Pronouncement

Recent Accounting Pronouncements	3 Months Ended
	Mar. 31, 2018
Text Block [Abstract]
Recent Accounting Pronouncements	Note 14 – Recent Accounting Pronouncements ASU 2014-09, “Revenue from Contracts with Customers.” On January 1, 2018, the Company adopted the new accounting standard ASC 606, “Revenue from Contracts with Customers” and all the related amendments (Topic 606) using the modified retrospective method for all contracts not completed as of the date of adoption. For contracts that were modified before the effective date, the Company reflected the aggregate effect of all modifications when identifying performance obligations and allocating transaction price in accordance with practical expedient ASC 606-10-65-1-(f)-4, which did not have a material effect on the Company’s assessment of the cumulative effect adjustment upon adoption. The Company recognized the cumulative effect of initially applying the new standard as an adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. See Note 1 for details of the Company’s adoption of Topic 606. ASU 2016-02, “Leases” In February 2016, the FASB issued ASU No. 2016-02, “Leases”. The standard establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. We are currently evaluating the impact of our pending adoption of the new standard on our consolidated financial statements, however the adoption of the standard is expected to increase both assets and liabilities for leases that would previously have been off-balance sheet operating leases.

Basis of Presentation and Sig20

Basis of Presentation and Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Revenue Recognition	Revenue Recognition Adoption of ASC Topic 606, “Revenue from Contracts with Customers” On January 1, 2018, the Company adopted the new accounting standard ASC 606, “Revenue from Contracts with Customers” and all the related amendments (Topic 606) using the modified retrospective method for all contracts not completed as of the date of adoption. For contracts that were modified before the effective date, the Company reflected the aggregate effect of all modifications when identifying performance obligations and allocating transaction price in accordance with practical expedient ASC 606-10-65-1-(f)-4, which did not have a material effect on the Company’s assessment of the cumulative effect adjustment upon adoption. The Company recognized the cumulative effect of initially applying the new standard as an adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. Results for reporting periods beginning after January 1, 2018 are presented under Topic 606, while prior period amounts are not adjusted and continue to be reported in accordance with our historic accounting under Topic 605. A significant portion of the Company’s revenue continues to be recognized when products are shipped from manufacturing or warehousing facilities. Revenue generated from fixed fee service contracts and source agreements continues to be recognized on a straight-line basis over the term of the agreement. Revenue generated from professional service contracts entered into with customers on a time and material basis is recognized over the term of the agreement in proportion to the costs incurred in satisfying the obligations under the contract. Components of certain fixed fee service contracts are accounted for as a lease and therefore are outside the scope of Topic 606. See Note 1 for further details. We recorded a net increase to opening retained earnings of $0.1 million as of January 1, 2018 due to the cumulative impact of adopting Topic 606, with the impact primarily related to the deferral of commissions on our long-term service arrangements and warranty periods greater than one year, which previously were expensed as incurred but under the amendments to ASC 340-40 will generally be capitalized and amortized over the period of contract performance or a longer period if renewals are expected and the renewal commission is not commensurate with the initial commission. The cumulative effect of the changes made to the Company’s consolidated balance sheet for the adoption of Topic 606 were as follows (in thousands): Selected Balance Sheet Balance at Adjustments Due Balance at Assets Prepaid expenses and other current assets $ 1,100 $ 147 $ 1,247 Liabilities Deferred revenue — 409 409 Contract liabilities 5,910 (370 ) 5,540 Stockholders’ equity Accumulated deficit (201,865 ) 108 (201,973 ) In accordance with the requirements of the new standard, the disclosure of the impact of the adoption on our consolidated balance sheet and statement of operations was as follows (in thousands): As of March 31, 2018 Selected Balance Sheet As Reported Balances without Effect of Change Assets Prepaid expenses and other current assets $ 1,158 $ 996 $ (162 ) Liabilities Accrued expenses 4,685 4,685 — Deferred revenue 352 352 — Contract liabilities 5,896 5,879 (17 ) Deferred tax 6 6 — Stockholders’ equity Accumulated deficit (205,039 ) (205,184 ) (145 ) The impact to revenues for the quarter ended March 31, 2018 was a decrease of $17,000 as a result of applying Topic 606. Three months ended March 31, 2018 Selected Statement of Operations As Reported Balances without Effect of Change Revenue Products $ 3,014 $ 3,025 $ 11 Service and supplies 3,299 3,271 (28) Cost of revenue Products 458 458 — Service and supplies 1,252 1,252 — Operating expenses Marketing and sales 2,166 2,328 162 Interest expense (142 ) (142) — Other income 22 22 — Tax benefit (expense) (13 ) (13) — Net loss (3,281 ) (3,460 ) (179 ) Revenue Recognition In accordance with ASC 606, revenue is recognized when a customer obtains control of promised goods or services. The amount of revenue recognized reflects the consideration to which the Company expects to be entitled to receive in exchange for these goods or services, and excludes any sales incentives or taxes collected from customer which are subsequently remitted to government authorities. To achieve this core principle, the Company applies the following five steps: 1) Identify the contract(s) with a customer 2) Identify the performance obligations in the contract 3) Determine the transaction price 4) Allocate the transaction price to the performance obligations in the contract 5) Recognize revenue when (or as) the Company satisfies a performance obligation The Company recognizes revenue from its contracts with customers primarily from the sale of products and from the sale of services and supplies. Revenue is recognized when control of the promised goods or services is transferred to a customer, in an amount that reflects the consideration we expect to be entitled to in exchange for those goods or services. For product revenue, control has transferred upon shipment provided title and risk of loss have passed to the customer. Services and supplies are considered to be transferred as the services are performed or over the term of the service or supply agreement. The Company enters into contracts that can include various combinations of products and services, which are generally capable of being distinct and accounted for as separate performance obligations. The Company’s hardware is generally highly dependent on, and interrelated with, the underlying software and the software is considered essential to the functionality of the product. In these cases, the hardware and software license are accounted for as a single performance obligation and revenue is recognized at the point in time when ownership is transferred to the customer. Taxes assessed by a governmental authority that are both imposed on and concurrent with a specific revenue-producing transaction, that are collected by the Company from a customer, are excluded from revenue. Shipping and handling costs associated with outbound freight after control of a product has transferred to a customer are accounted for as fulfillment costs and are included in cost of revenue. Disaggregation of Revenue The following tables presents our revenues disaggregated by major good or service line, timing of revenue recognition, and sales channel, reconciled to our reportable segments (in thousands). Three months ended March 31, 2018 Reportable Segments Detection Therapy Total Major Goods/Service Lines Products $ 2,489 $ 1,068 $ 3,557 Service contracts 1,327 362 1,689 Supply and source usage agreements — 529 529 Professional services — 144 144 Other 54 199 253 $ 3,870 $ 2,302 $ 6,172 Timing of Revenue Recognition Goods transferred at a point in time $ 2,489 $ 1,271 $ 3,760 Services transferred over time 1,381 1,031 2,412 $ 3,870 $ 2,302 $ 6,172 Sales Channels Direct sales force $ 1,726 $ 2,041 $ 3,767 OEM partners 2,144 — 2,144 Channel partners — 261 261 $ 3,870 $ 2,302 $ 6,172 Total Revenue Revenue from contracts with customers $ 3,870 $ 2,302 $ 6,172 Revenue from lease components 141 — 141 $ 4,011 $ 2,302 $ 6,313 Three months ended March 31, 2017(1) Reportable Segments Detection Therapy Total Major Goods/Service Lines Products $ 2,667 $ 1,156 $ 3,823 Service contracts 1,476 416 1,892 Supply and source usage agreements — 469 469 Professional services — 53 53 Other 199 208 407 $ 4,342 $ 2,302 $ 6,644 Timing of Revenue Recognition Goods transferred at a point in time 2,667 1,143 $ 3,810 Services transferred over time 1,675 1,159 2,834 $ 4,342 $ 2,302 $ 6,644 Sales Channels Direct sales force $ 2,137 $ 2,141 $ 4,278 OEM partners 2,205 — 2,205 Channel partners — 161 161 $ 4,342 $ 2,302 $ 6,644 Total Revenue Revenue from contracts with customers $ 4,342 $ 2,302 $ 6,644 Revenue from lease components 147 — 147 $ 4,489 $ 2,302 $ 6,791 (1) As noted above, prior period amounts have not been adjusted under the modified retrospective method. Products. Service Contracts. Supply and Source Usage Agreements. Professional Services. Other. Significant Judgments The Company’s contracts with customers may include promises to transfer multiple products and services to a customer. Determining whether products and services are considered distinct performance obligations that should be accounted for separately versus together may require significant judgment. For arrangements with multiple performance obligations, the Company allocates revenue to each performance obligation based on its relative standalone selling price. Judgment is required to determine the standalone selling price for each distinct performance obligation. The Company generally determines standalone selling prices based on the prices charged to customers and uses a range of amounts to estimate standalone selling prices when we sell each of the products and services separately and need to determine whether there is a discount that needs to be allocated based on the relative standalone selling prices of the various products and services. The Company typically has more than one range of standalone selling prices for individual products and services due to the stratification of those products and services by customers and circumstances. In these instances, the Company may use information such as the type of customer and geographic region in determining the range of standalone selling prices. The Company may provide credits or incentives to customers, which are accounted for as variable consideration when estimating the transaction price of the contract and amounts of revenue to recognize. The amount of variable consideration to include in the transaction price is estimated at contract inception using either the estimated value method or the most likely amount method based on the nature of the variable consideration. These estimates are updated at the end of each reporting period as additional information becomes available and revenue is recognized only to the extent that it is probable that a significant reversal of any amounts of variable consideration included in the transaction price will not occur. The Company provides for estimated warranty costs on original product warranties at the time of sale. Contract Balances Contract liabilities are a component of deferred revenue, and Contract Assets are a component of Prepaid and other current assets. The following table provides information about receivables, contract assets, and contract liabilities from contracts with customers (in thousands). Balance at Receivables, which are included in ‘Trade accounts receivable’ $ 7,187 Contract assets, which are included in “Prepaid and other current assets” 35 Contract liabilities, which is included in “Deferred revenue” 5,896 Timing of revenue recognition may differ from timing of invoicing to customers. The Company records a receivable when revenue is recognized prior to receipt of cash payments and the Company has the unconditional right to such consideration, or unearned revenue when cash payments are received or due in advance of performance. For multi-year agreements, the Company generally invoices customers annually at the beginning of each annual service period. The opening balance of accounts receivable from contracts with customers, net of allowance for doubtful accounts, was $8.5 million as of January 1, 2018. As of March 31, 2018, accounts receivable, net of allowance for doubtful accounts, was $7.2 million. The Company will record a contract asset for unbilled revenue when the Company’s performance is in excess of amounts billed or billable. The Company has classified the contract asset balance as a component of prepaid expenses and other current assets as of January 1, 2018 and March 31, 2018. The opening balance of contract assets was $166,000 as of January 1, 2018. As of March 31, 2018, the contract asset balance was $35,000. Deferred revenue from contracts with customers is primarily composed of fees related to long-term service arrangements, which are generally billed in advance. Deferred revenue also includes payments for installation and training that has not yet completed and other offerings for which we have been paid in advance and earn the revenue when we transfer control of the product or service. Deferred revenue from contracts with customers is included in deferred revenue in the consolidated balance sheets. Deferred revenue on the consolidated balance sheet also includes $369,000 and $352,000 at December 31, 2017 and March 31, 2018, respectively of amounts associated with service contracts accounted for under Topic 840. The balance of deferred revenue at December 31, 2017 and March 31, 2018 is as follows: December 31, 2017 Contract Lease revenue Total Short term $ 5,044 $ 360 $ 5,404 Long term 497 9 506 Total $ 5,541 $ 369 $ 5,910 March 31, 2018 Contract Lease revenue Total Short term $ 5,139 $ 336 $ 5,475 Long term 757 16 773 Total $ 5,896 $ 352 $ 6,248 Changes in deferred revenue from contracts with customers were as follows (in thousands): Three Months Balance at beginning of period $ 5,541 Adoption adjustment 39 Deferral of revenue 2,668 Recognition of deferred revenue (2,352 ) Balance at end of period $ 5,896 We expect to recognize approximately $4.8 million of the deferred amount in 2018, $0.8 million in 2019, and $0.3 million thereafter. Assets Recognized from the Costs to Obtain a Contract with a Customer We recognize an asset for the incremental costs of obtaining a contract with a customer if we expect the benefit of those costs to be longer than one year. We have determined that certain commissions programs meet the requirements to be capitalized. The opening balance of capitalized costs to obtain a contract was $117,000 as of January 1, 2018. As of March 31, 2018, the balance of capitalized costs to obtain a contract was $162,000. The Company has classified the capitalized costs to obtain a contract as a component of prepaid expenses and other current assets as of January 1, 2018 and March 31, 2018. Changes in the balance of capitalized costs to obtain a contract were as follows (in thousands): Three Months Balance at beginning of period $ 117 Deferral of costs to obtain a contract 84 Recognition of costs to obtain a contract (39 ) Balance at end of period $ 162 Practical Expedients and Exemptions The Company has elected to make the following accounting policy elections through the adoption of the following practical expedients: Right to Invoice Where applicable, the Company will recognize revenue from a contract with a customer in an amount that corresponds directly with the value to the customer of the Company’s performance completed to date and the amount to which the entity has a right to invoice. Sales and Other Similar Taxes The Company will exclude sales taxes and similar taxes from the measurement of transaction price and will ensure that it complies with the disclosure requirements of ASC 235-10-50-1 through 50-6. Significant Financing Component The Company will not adjust the promised amount of consideration for the effects of a significant financing component if the Company expects, at contract inception, that the period between when the entity transfers a promised good or service to a customer and when the customer pays for that good or service will be one year or less. Cost to Obtain a Contract The Company will recognize the incremental costs of obtaining a contract as an expense when incurred if the amortization period of the asset that the Company otherwise would have recognized is one year or less and there are no renewal periods on which the Company does not pay commissions that are not commensurate with those originally paid. Promised Goods or Services that are Immaterial in the Context of a Contract The Company has elected to assess promised goods or services as performance obligations that are deemed to be immaterial in the context of a contract. As such, the Company will not aggregate and assess immaterial items at the entity level. That is, when determining whether a good or service is immaterial in the context of a contract, the assessment will be made based on the application of ASC 606 at the contract level. The Company does not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed.
Cost of Revenue	Cost of Revenue Cost of revenue consists of the costs of products purchased for resale, costs relating to service including personnel costs for physicists, management services and radiation therapists, costs of service contracts to maintain equipment after the warranty period, product installation, training, customer support, certain warranty repair costs, inbound freight and duty, cost of supplies, manufacturing, warehousing, material movement, inspection, scrap, rework, amortization, depreciation and in-house product warranty repairs.
Compensation - Stock Compensation	The Company follows the guidance in ASC Topic 718, “ Compensation – Stock Compensation ,
Litigation	Litigation The Company is a party to various legal proceedings and claims arising out of the ordinary course of its business. Although the final results of all such matters and claims cannot be predicted with certainty, the Company currently believes that there are no current proceedings or claims pending against it the ultimate resolution of which would have a material adverse effect on its financial condition or results of operations. However, should the Company fail to prevail in any legal matter or should several legal matters be resolved against the Company in the same reporting period, such matters could have a material adverse effect on our operating results and cash flows for that particular period. In all cases, at each reporting period, the Company evaluates whether or not a potential loss amount or a potential range of loss is probable and reasonably estimable under ASC 450, Contingencies. Legal costs are expensed as incurred.
Fair Value Measurements	Fair Value Measurements The Company follows the provisions of ASC Topic 820, “ Fair Value Measurement and Disclosures • Level 1 – Quoted prices in active markets for identical assets or liabilities. • Level 2 – Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. • Level 3 – Unobservable inputs that are supported by little or no market activity and that are significant to the fair value. A financial instrument’s level within the fair value hierarchy is based on the lowest level of any input that is significant to the fair value measurement. Our financial instruments include cash and cash equivalents, accounts receivable, accounts payable certain accrued liabilities and debt. The carrying amounts of our cash and cash equivalents (which are composed primarily of deposit and overnight sweep accounts), accounts receivable, accounts payable and certain accrued liabilities approximate fair value due to the short maturity of these instruments. The carrying value of our term loan approximates fair value due to the market rate of the stated interest rate. The Company’s assets that are measured at fair value on a recurring basis relate to the Company’s money market accounts. The Company’s money market funds are included in cash and cash equivalents in the accompanying balance sheets and are considered a Level 1 investment as they are valued at quoted market prices in active markets. The following table sets forth the Company’s assets and liabilities which are measured at fair value on a recurring basis by level within the fair value hierarchy. Fair value measurements using: (000’s) as of December 31, 2017 Level 1 Level 2 Level 3 Total Assets Money market accounts $ 8,853 $ — $ — $ 8,853 Total Assets $ 8,853 $ — $ — $ 8,853 Fair value measurements using: (000’s) as of March 31, 2018 Level 1 Level 2 Level 3 Total Assets Money market accounts $ 7,967 $ — $ — $ 7,967 Total Assets $ 7,967 $ — $ — $ 7,967
Income Taxes	Income Taxes The Company recorded an income tax provision of $13,000 and $17,000 for the three months ended March 31, 2018 and 2017, respectively. At March 31, 2018, the Company had no material unrecognized tax benefits and a deferred tax liability of approximately $6,000 related to tax amortizable goodwill. The Company recorded a decrease in the deferred tax liability of approximately $8,000 through March 31, 2018. No other adjustments were required under ASC 740, “Income Taxes”. The Company does not expect that the unrecognized tax benefits will materially increase within the next 12 months. The Company did not recognize any interest or penalties related to uncertain tax positions at March 31, 2018. The Company’s estimate of the Tax Cut and Jobs Act (“TCJA”) and the remeasurement of our deferred tax assets and liabilities is subject to the finalization of the Company’s analysis related to certain matters, such as developing interpretations of the provisions of the TCJA, changes to certain estimates and the filing of the Company’s tax returns. U.S. Treasury regulations, administrative interpretations or court decisions interpreting the TCJA may require further adjustments and changes in the Company’s estimates. The final determination of the TCJA and the re-measurement of the Company’s deferred assets and liabilities will be completed as additional information becomes available, but no later than one year from the enactment of the TCJA. For the three months ended March 31, 2018, there were no changes to the Company’s analysis performed as of December 31, 2017. The Company files United States federal income tax returns and income tax returns in various states and local jurisdictions. The Company’s three preceding tax years remain subject to examination by federal and state taxing authorities. In addition, because the Company has net operating loss carry-forwards, the Internal Revenue Service and state jurisdictions are permitted to audit earlier years and propose adjustments up to the amount of net operating loss generated in those years. The Company is not currently under examination by any federal or state jurisdiction for any tax years.
Intangibles - Goodwill and Other	In accordance with FASB Accounting Standards Codification (“ASC”) Topic 350-20, “Intangibles – Goodwill and Other” 350-20”),
Long-lived assets	In accordance with FASB ASC Topic 360, “Property, Plant and Equipment”, (“ASC 360”), the Company assesses long-lived assets for impairment if events and circumstances indicate it is more likely than not that the fair value of the asset group is less than the carrying value of the asset group. ASC 360-10-35 uses “events and circumstances” criteria to determine when, if at all, an asset (or asset group) is evaluated for recoverability. Thus, there is no set interval or frequency for recoverability evaluation. In accordance with ASC 360-10-35-21, the following factors are examples of events or changes in circumstances that indicate the carrying amount of an asset (asset group) may not be recoverable and thus is to be evaluated for recoverability. • A significant decrease in the market price of a long-lived asset (asset group); • A significant adverse change in the extent or manner in which a long-lived asset (asset group) is being used or in its physical condition; • A significant adverse change in legal factors or in the business climate that could affect the value of a long-lived asset (asset group), including an adverse action or assessment by a regulator; • An accumulation of costs significantly in excess of the amount originally expected for the acquisition or construction of a long-lived asset (asset group); • A current period operating or cash flow loss combined with a history of operating or cash flow losses or a projection or forecast that demonstrates continuing losses associated with the use of a long-lived asset (asset group).
Segment Reporting	In accordance with FASB Topic ASC 280, “ Segments
Recent Accounting Pronouncements	Recent Accounting Pronouncements ASU 2014-09, “Revenue from Contracts with Customers.” On January 1, 2018, the Company adopted the new accounting standard ASC 606, “Revenue from Contracts with Customers” and all the related amendments (Topic 606) using the modified retrospective method for all contracts not completed as of the date of adoption. For contracts that were modified before the effective date, the Company reflected the aggregate effect of all modifications when identifying performance obligations and allocating transaction price in accordance with practical expedient ASC 606-10-65-1-(f)-4, which did not have a material effect on the Company’s assessment of the cumulative effect adjustment upon adoption. The Company recognized the cumulative effect of initially applying the new standard as an adjustment to the opening balance of retained earnings. The comparative information has not been restated and continues to be reported under the accounting standards in effect for those periods. See Note 1 for details of the Company’s adoption of Topic 606. ASU 2016-02, “Leases” In February 2016, the FASB issued ASU No. 2016-02, “Leases”. The standard establishes a right-of-use (“ROU”) model that requires a lessee to record a ROU asset and a lease liability on the balance sheet for all leases with terms longer than 12 months. Leases will be classified as either finance or operating, with classification affecting the pattern of expense recognition in the income statement. The new standard is effective for fiscal years beginning after December 15, 2018, including interim periods within those fiscal years. A modified retrospective transition approach is required for lessees for capital and operating leases existing at, or entered into after, the beginning of the earliest comparative period presented in the financial statements, with certain practical expedients available. We are currently evaluating the impact of our pending adoption of the new standard on our consolidated financial statements, however the adoption of the standard is expected to increase both assets and liabilities for leases that would previously have been off-balance sheet operating leases.

Basis of Presentation and Sig21

Basis of Presentation and Significant Accounting Policies (Tables)	3 Months Ended
	Mar. 31, 2018
Revenues Disaggregated by Major Good or Service Line, Timing of Revenue Recognition, and Sales Channel, Reconciled to Our Reportable Segments	The following tables presents our revenues disaggregated by major good or service line, timing of revenue recognition, and sales channel, reconciled to our reportable segments (in thousands). Three months ended March 31, 2018 Reportable Segments Detection Therapy Total Major Goods/Service Lines Products $ 2,489 $ 1,068 $ 3,557 Service contracts 1,327 362 1,689 Supply and source usage agreements — 529 529 Professional services — 144 144 Other 54 199 253 $ 3,870 $ 2,302 $ 6,172 Timing of Revenue Recognition Goods transferred at a point in time $ 2,489 $ 1,271 $ 3,760 Services transferred over time 1,381 1,031 2,412 $ 3,870 $ 2,302 $ 6,172 Sales Channels Direct sales force $ 1,726 $ 2,041 $ 3,767 OEM partners 2,144 — 2,144 Channel partners — 261 261 $ 3,870 $ 2,302 $ 6,172 Total Revenue Revenue from contracts with customers $ 3,870 $ 2,302 $ 6,172 Revenue from lease components 141 — 141 $ 4,011 $ 2,302 $ 6,313 Three months ended March 31, 2017(1) Reportable Segments Detection Therapy Total Major Goods/Service Lines Products $ 2,667 $ 1,156 $ 3,823 Service contracts 1,476 416 1,892 Supply and source usage agreements — 469 469 Professional services — 53 53 Other 199 208 407 $ 4,342 $ 2,302 $ 6,644 Timing of Revenue Recognition Goods transferred at a point in time 2,667 1,143 $ 3,810 Services transferred over time 1,675 1,159 2,834 $ 4,342 $ 2,302 $ 6,644 Sales Channels Direct sales force $ 2,137 $ 2,141 $ 4,278 OEM partners 2,205 — 2,205 Channel partners — 161 161 $ 4,342 $ 2,302 $ 6,644 Total Revenue Revenue from contracts with customers $ 4,342 $ 2,302 $ 6,644 Revenue from lease components 147 — 147 $ 4,489 $ 2,302 $ 6,791 (1) As noted above, prior period amounts have not been adjusted under the modified retrospective method.
Summary of Receivables, Contract Assets and Contract Liabilities from Contracts with Customers	The following table provides information about receivables, contract assets, and contract liabilities from contracts with customers (in thousands). Balance at Receivables, which are included in ‘Trade accounts receivable’ $ 7,187 Contract assets, which are included in “Prepaid and other current assets” 35 Contract liabilities, which is included in “Deferred revenue” 5,896
Summary of Changes in Deferred Revenue	Changes in deferred revenue from contracts with customers were as follows (in thousands): Three Months Balance at beginning of period $ 5,541 Adoption adjustment 39 Deferral of revenue 2,668 Recognition of deferred revenue (2,352 ) Balance at end of period $ 5,896
Schedule of Changes of Capitalized Costs to Obtain Contract	Changes in the balance of capitalized costs to obtain a contract were as follows (in thousands): Three Months Balance at beginning of period $ 117 Deferral of costs to obtain a contract 84 Recognition of costs to obtain a contract (39 ) Balance at end of period $ 162
Accounting Standards Update 2014-09 [Member]
Summary of Cumulative Effect of The Changes	The cumulative effect of the changes made to the Company’s consolidated balance sheet for the adoption of Topic 606 were as follows (in thousands): Selected Balance Sheet Balance at Adjustments Due Balance at Assets Prepaid expenses and other current assets $ 1,100 $ 147 $ 1,247 Liabilities Deferred revenue — 409 409 Contract liabilities 5,910 (370 ) 5,540 Stockholders’ equity Accumulated deficit (201,865 ) 108 (201,973 )
Summary of Impact of The Adoption On Our Consolidated Balance Sheet and Statement of Operations	In accordance with the requirements of the new standard, the disclosure of the impact of the adoption on our consolidated balance sheet and statement of operations was as follows (in thousands): As of March 31, 2018 Selected Balance Sheet As Reported Balances without Effect of Change Assets Prepaid expenses and other current assets $ 1,158 $ 996 $ (162 ) Liabilities Accrued expenses 4,685 4,685 — Deferred revenue 352 352 — Contract liabilities 5,896 5,879 (17 ) Deferred tax 6 6 — Stockholders’ equity Accumulated deficit (205,039 ) (205,184 ) (145 ) Three months ended March 31, 2018 Selected Statement of Operations As Reported Balances without Effect of Change Revenue Products $ 3,014 $ 3,025 $ 11 Service and supplies 3,299 3,271 (28) Cost of revenue Products 458 458 — Service and supplies 1,252 1,252 — Operating expenses Marketing and sales 2,166 2,328 162 Interest expense (142 ) (142 ) — Other income 22 22 — Tax benefit (expense) (13 ) (13 ) — Net loss (3,281 ) (3,460 ) (179 )
Accounting Standards Update 2016-02 [Member]
Summary of Changes in Deferred Revenue	The balance of deferred revenue at December 31, 2017 and March 31, 2018 is as follows: December 31, 2017 Contract Lease revenue Total Short term $ 5,044 $ 360 $ 5,404 Long term 497 9 506 Total $ 5,541 $ 369 $ 5,910 March 31, 2018 Contract Lease revenue Total Short term $ 5,139 $ 336 $ 5,475 Long term 757 16 773 Total $ 5,896 $ 352 $ 6,248

Loss per Common Share (Tables)

Loss per Common Share (Tables)	3 Months Ended
	Mar. 31, 2018
Earnings Per Share [Abstract]
Calculation of Net Loss Per Share	A summary of the Company’s calculation of net loss per share is as follows (in thousands except per share amounts): Three Months Ended 2018 2017 Net loss $ (3,281 ) $ (457 ) Shares used in the calculation of basic and diluted net loss per share 16,583 16,135 Effect of dilutive securities: Stock options — — Restricted stock — — Diluted shares used in the calculation of net loss per share 16,583 16,135 Net loss per share – basic and diluted $ (0.20 ) $ (0.03 )
Schedule of Anti-dilutive Shares Excluded from Computation of Diluted Net Loss Per Share	The shares of the Company’s common stock issuable upon the exercise of stock options and vesting of restricted stock that were excluded from the calculation of diluted net loss per share because their effect would have been antidilutive are as follows: Period Ended March 31, 2018 2017 Stock options 1,378,258 1,440,291 Restricted stock 580,880 442,817 Stock options and restricted stock 1,959,138 1,883,108

Sale of MRI Assets (Tables)

Sale of MRI Assets (Tables)	3 Months Ended
	Mar. 31, 2018
Discontinued Operations and Disposal Groups [Abstract]
Schedule of Net Assets Sold	The value of the net assets sold is as follows (in thousands): Assets Accounts Receivable $ 116 Intangible assets 810 Allocated Goodwill 394 Total Assets $ 1,320 Liabilities Deferred Revenue $ 746 Total Liabilities $ 746 Net Assets Sold $ 574
Schedule of Components of Gain on Sale	The components of the gain on the sale are as follows (in thousands): Gain on Sale Cash received $ 2,850 Holdback reserve 350 Fair value of transition services (118 ) Net Assets sold (574 ) Total $ 2,508

Inventory (Tables)

Inventory (Tables)	3 Months Ended
	Mar. 31, 2018
Inventory Disclosure [Abstract]
Schedule of Current Inventory	Inventories consisted of the following (in thousands), which includes an inventory reserve of approximately $1.2 million as of March 31, 2018 and December 31, 2017, respectively. as of March 31, as of December Raw materials $ 993 $ 992 Work in process 133 63 Finished Goods 1,071 1,068 Inventory $ 2,197 $ 2,123

Debt Financing (Tables)

Debt Financing (Tables)	3 Months Ended
	Mar. 31, 2018
Debt Disclosure [Abstract]
Schedule of Carrying Value of Term Loan Net of Debt Issuance Costs	The carrying value of the Term Loan (net of debt issuance costs) as of March 31, 2018 and December 31, 2017 is as follows (in thousands): March 31, 2018 December 31, 2017 Principal Amount of Term Loan $ 6,000 $ 6,000 Unamortized closing costs (66 ) (64 ) Accrued Final Payment 66 — Carrying amount of Term Loan 6,000 5,936 Less current portion of Term Loan (1,190 ) (817 ) Notes payable long-term portion $ 4,810 $ 5,119
Summary of Principal and Interest Payments	Principal and interest payments are as follows (in thousands): Fiscal Year Amount Due 2018 $ 1,030 2019 2,186 2020 2,095 2021 1,660 Total $ 6,971
Interest Expense in Consolidated Income Statement	The following amounts are included in interest expense in our consolidated statement of operations for the three months ended March 31, 2018 and 2017 (in thousands): March 31, 2018 March 31, 2017 Cash interest expense $ 68 $ — Final Payment accrual 66 — Amortization of debt costs 7 — Amortization of settlement obligations — 13 Interest expense capital lease 1 — Capital lease – fair value amortization — (8 ) Total interest expense $ 142 $ 5

Lease Commitments (Tables)

Lease Commitments (Tables)	3 Months Ended
	Mar. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Future Minimum Lease Payments under Operating Leases	Future minimum lease payments as of March 31, 2018 under operating leases are as follows: (in thousands) Fiscal Year Operating 2018 $ 575 2019 755 2020 174 Total $ 1,504
Future Minimum Lease Payments under Non-cancelable Capital Leases	Minimum lease payments are as follows (in thousands): Fiscal Year Capital 2018 $ 12 2019 17 2020 13 subtotal minimum lease obligation 42 less interest (7 ) Total, net 35 less current portion (13 ) long term portion $ 22

Stock-Based Compensation (Table

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2018
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options Granted under Company's Stock Incentive Plans, Valuation Assumptions and Fair Values	Options granted under the Company’s stock incentive plans were valued utilizing the Black-Scholes model using the following assumptions and had the following fair values: Three Months Ended March 31, 2018 2017 Average risk-free interest rate 2.33% 1.48% Expected dividend yield None None Expected life 3.5 years 3.5 years Expected volatility 60.8% to 61.3% 70.8% to 72.0% Weighted average exercise price $3.08 $4.78 Weighted average fair value $1.40 $2.45
Stock-Based Compensation Expense Including Options and Restricted Stock by Category	The Company’s stock-based compensation expense, including options and restricted stock by category is as follows (in thousands): Three Months Ended 2018 2017 Cost of revenue $ 1 $ 2 Engineering and product development 97 205 Marketing and sales — 223 General and administrative 293 539 $ 391 $ 969
Unrecognized Compensation Cost Related to Unexercisable Options and Unvested Restricted Stock and Weighted Average Remaining Period	As of March 31, 2018, unrecognized compensation cost (in thousands) related to unexercisable options and unvested restricted stock and the weighted average remaining period is as follows: Remaining expense $ 2,225 Weighted average term 1.2 years
Aggregate Intrinsic Value	The Company’s aggregate intrinsic value for stock options and restricted stock outstanding is as follows (in thousands): Period Ended Aggregate intrinsic value 2018 2017 Stock options $ 273 $ 1,425 Restricted stock 1,789 2,039

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2018
Fair Value Disclosures [Abstract]
Assets and Liabilities which are Measured at Fair Value on a Recurring Basis	The following table sets forth the Company’s assets and liabilities which are measured at fair value on a recurring basis by level within the fair value hierarchy. Fair value measurements using: (000’s) as of December 31, 2017 Level 1 Level 2 Level 3 Total Assets Money market accounts $ 8,853 $ — $ — $ 8,853 Total Assets $ 8,853 $ — $ — $ 8,853 Fair value measurements using: (000’s) as of March 31, 2018 Level 1 Level 2 Level 3 Total Assets Money market accounts $ 7,967 $ — $ — $ 7,967 Total Assets $ 7,967 $ — $ — $ 7,967

Goodwill (Tables)

Goodwill (Tables)	3 Months Ended
	Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Roll Forward of Goodwill Activity by Reportable Segment	A rollforward of goodwill activity by reportable segment is as follows (in thousands): Detection Therapy Total Balance at December 31, 2017 $ 8,362 $ — $ 8,362 Balance at March 31, 2018 $ 8,362 $ — $ 8,362 Accumulated Goodwill $ 699 $ 6,270 $ 54,906 Fair value allocation 7,663 13,446 — Accumulated impairment — (19,716 ) (46,544 ) Balance at March 31, 2018 $ 8,362 $ — $ 8,362

Segment Reporting (Tables)

Segment Reporting (Tables)	3 Months Ended
	Mar. 31, 2018
Segment Reporting [Abstract]
Summary of Segment Revenues, Gross Profit, Segment Operating Income or Loss and Reconciliation of Segment Operating Income or Loss to GAAP Loss	Segment revenues, gross profit, segment operating income or loss, and a reconciliation of segment operating income or loss to GAAP loss before income tax is as follows (in thousands): Three Months Ended 2018 2017 Segment revenues: Detection $ 4,011 $ 4,489 Therapy 2,302 2,302 Total Revenue $ 6,313 $ 6,791 Segment gross profit: Detection $ 3,529 $ 4,001 Therapy 969 688 Segment gross profit $ 4,498 $ 4,689 Segment operating income (loss): Detection $ (13 ) $ 1,502 Therapy (1,066 ) (2,383 ) Segment operating income (loss) $ (1,079 ) $ (881 ) General, administrative, depreciation and amortization expense $ (2,069 ) $ (2,062 ) Interest expense (142 ) (5 ) Gain on sale of MRI assets — 2,508 Other income 22 — Loss before income tax $ (3,268 ) $ (440 )

Basis of Presentation and Sig31

Basis of Presentation and Significant Accounting Policies - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018USD ($)Segment	Jan. 01, 2018USD ($)	Dec. 31, 2017USD ($)
Basis Of Presentation And Significant Accounting Policies [Line Items]
Business segment | Segment	2
Increase to retained earnings	$ (205,039,000)		$ (201,865,000)
Allowance for doubtful accounts, receivable	7,200,000	$ 8,500,000
Contract assets	35,000	166,000
Deferred revenue	352,000		369,000
Unearned amount to recognize in 2018	4,800,000
Unearned amount to recognize in 2019	800,000
Unearned amount to recognize, thereafter	300,000
Capitalized costs to obtain a contract	$ 162,000	117,000	$ 117,000
Product delivery period to customer	One year or less.
Accounting Standards Update 2014-09 [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Increase to retained earnings	$ (145,000)	(201,973,000)
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect Before and After Topic 606 [Member]
Basis Of Presentation And Significant Accounting Policies [Line Items]
Increase to retained earnings	(205,184,000)	$ 108,000
Revenues	(17,000)
Deferred revenue	$ 352,000

Basis of Presentation and Sig32

Basis of Presentation and Significant Accounting Policies - Summary of Cumulative Effect of The Changes (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Assets
Prepaid expenses and other current assets	$ 1,158		$ 1,100
Liabilities
Deferred revenue	5,476		5,404
Contract liabilities	5,896		5,910
Stockholders' equity
Accumulated deficit	(205,039)		$ (201,865)
Accounting Standards Update 2014-09 [Member]
Assets
Prepaid expenses and other current assets	(162)	$ 1,247
Liabilities
Deferred revenue		409
Contract liabilities	(17)	5,540
Stockholders' equity
Accumulated deficit	(145)	(201,973)
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect Before and After Topic 606 [Member]
Assets
Prepaid expenses and other current assets	996	147
Liabilities
Deferred revenue		409
Contract liabilities	5,879	(370)
Stockholders' equity
Accumulated deficit	$ (205,184)	$ 108

Basis of Presentation and Sig33

Basis of Presentation and Significant Accounting Policies - Summary of Impact of The Adoption On Our Consolidated Balance Sheet and Statement of Operations (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Jan. 01, 2018	Dec. 31, 2017
Assets
Prepaid expenses and other current assets	$ 1,158			$ 1,100
Liabilities
Accrued expenses	4,685			4,475
Deferred revenue	352			369
Contract liabilities	5,896			5,910
Deferred tax	6			14
Stockholders' equity
Accumulated deficit	(205,039)			$ (201,865)
Revenue
Products	3,014	$ 3,131
Service and supplies	3,299	3,660
Cost of revenue
Products	458	420
Service and supplies	1,252	1,384
Operating expenses
Marketing and sales	2,166	2,902
Interest expense	(142)	(5)
Other income	22
Tax benefit (expense)	(13)	(17)
Net loss	(3,281)	$ (457)
Accounting Standards Update 2014-09 [Member]
Assets
Prepaid expenses and other current assets	(162)		$ 1,247
Liabilities
Contract liabilities	(17)		5,540
Stockholders' equity
Accumulated deficit	(145)		(201,973)
Revenue
Products	11
Service and supplies	(28)
Operating expenses
Marketing and sales	162
Net loss	(179)
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect Before and After Topic 606 [Member]
Assets
Prepaid expenses and other current assets	996		147
Liabilities
Accrued expenses	4,685
Deferred revenue	352
Contract liabilities	5,879		(370)
Deferred tax	6
Stockholders' equity
Accumulated deficit	(205,184)		$ 108
Revenue
Products	3,025
Service and supplies	3,271
Cost of revenue
Products	458
Service and supplies	1,252
Operating expenses
Marketing and sales	2,328
Interest expense	(142)
Other income	22
Tax benefit (expense)	(13)
Net loss	$ (3,460)

Basis of Presentation and Sig34

Basis of Presentation and Significant Accounting Policies - Revenues Disaggregated by Major Good or Service Line, Timing of Revenue Recognition, and Sales Channel, Reconciled to Our Reportable Segments (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 6,172	$ 6,644
Revenue from lease components	141	147
Total revenue	6,313	6,791
Products [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,557	3,823
Service Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,689	1,892
Supply and Source Usage Agreements [Member]
Disaggregation of Revenue [Line Items]
Revenues	529	469
Professional Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	144	53
Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	253	407
Goods Transferred at a Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,760	3,810
Services Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,412	2,834
Direct Sales Force [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,767	4,278
OEM Partners [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,144	2,205
Channel Partners [Member]
Disaggregation of Revenue [Line Items]
Revenues	261	161
Detection [Member]
Disaggregation of Revenue [Line Items]
Revenues	3,870	4,342
Revenue from lease components	141	147
Total revenue	4,011	4,489
Detection [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,489	2,667
Detection [Member] | Service Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,327	1,476
Detection [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	54	199
Detection [Member] | Goods Transferred at a Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,489	2,667
Detection [Member] | Services Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,381	1,675
Detection [Member] | Direct Sales Force [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,726	2,137
Detection [Member] | OEM Partners [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,144	2,205
Therapy [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,302	2,302
Total revenue	2,302	2,302
Therapy [Member] | Products [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,068	1,156
Therapy [Member] | Service Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenues	362	416
Therapy [Member] | Supply and Source Usage Agreements [Member]
Disaggregation of Revenue [Line Items]
Revenues	529	469
Therapy [Member] | Professional Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	144	53
Therapy [Member] | Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	199	208
Therapy [Member] | Goods Transferred at a Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,271	1,143
Therapy [Member] | Services Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,031	1,159
Therapy [Member] | Direct Sales Force [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,041	2,141
Therapy [Member] | Channel Partners [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 261	$ 161

Basis of Presentation and Sig35

Basis of Presentation and Significant Accounting Policies - Summary of Receivables, Contract Assets and Contract Liabilities from Contracts with Customers (Detail) - USD ($)	Mar. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Contract with Customer, Asset and Liability [Abstract]
Receivables, which are included in 'Trade accounts receivable'	$ 7,187,000
Contract assets, which are included in "Prepaid and other current assets"	35,000	$ 166,000
Contract liabilities, which is included in "Deferred revenue"	$ 5,896,000		$ 5,541,000

Basis of Presentation and Sig36

Basis of Presentation and Significant Accounting Policies - Summary of Deferred Revenue (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Deferred Revenue Arrangement [Line Items]
Contract liabilities	$ 5,896	$ 5,541
Lease revenue	352	369
Total	6,248	5,910
Short-term Debt [Member]
Deferred Revenue Arrangement [Line Items]
Contract liabilities	5,139	5,044
Lease revenue	336	360
Total	5,475	5,404
Long-term Debt [Member]
Deferred Revenue Arrangement [Line Items]
Contract liabilities	757	497
Lease revenue	16	9
Total	$ 773	$ 506

Basis of Presentation and Sig37

Basis of Presentation and Significant Accounting Policies - Summary of Changes in Deferred Revenue from Contracts with Customers (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Deferred Revenue Disclosure [Abstract]
Balance at beginning of period	$ 5,541
Adoption adjustment	39
Deferral of revenue	2,668
Recognition of deferred revenue	(2,352)
Balance at end of period	$ 5,896

Basis of Presentation and Sig38

Basis of Presentation and Significant Accounting Policies - Schedule of Changes of Capitalized Costs to Obtain Contract (Detail)	3 Months Ended
	Mar. 31, 2018USD ($)
Capitalized Contract Cost, Net [Abstract]
Balance at beginning of period	$ 117,000
Deferral of costs to obtain a contract	84,000
Recognition of costs to obtain a contract	(39,000)
Balance at end of period	$ 162,000

Loss per Common Share - Calcula

Loss per Common Share - Calculation of Net Loss Per Share (Detail) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]
Net loss	$ (3,281)	$ (457)
Shares used in the calculation of basic and diluted net loss per share	16,583	16,135
Effect of dilutive securities:
Diluted shares used in the calculation of net loss per share	16,583	16,135
Net loss per share - basic and diluted	$ (0.20)	$ (0.03)
Stock Options [Member]
Effect of dilutive securities:
Restricted stock	0	0
Restricted Stock [Member]
Effect of dilutive securities:
Restricted stock	0	0

Loss per Common Share - Schedul

Loss per Common Share - Schedule of Anti-dilutive Shares Excluded from Computation of Diluted Net Loss Per Share (Detail) - shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock options, warrants and restricted stock	1,959,138	1,883,108
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock options, warrants and restricted stock	1,378,258	1,440,291
Restricted Stock [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Common stock options, warrants and restricted stock	580,880	442,817

Sale of MRI Assets - Additional

Sale of MRI Assets - Additional Information (Detail) - VersaVue Software and DynaCAD Product and Related Assets [Member] - Asset Purchase Agreement [Member] - USD ($)	Jan. 30, 2017	Mar. 31, 2018	Dec. 31, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale and transfer of intangible assets			$ 3,200,000
Holdback reserve related to sale and transfer of intangible assets	$ 350,000	$ 350,000
Proceeds from sale and transfer of intangible assets	2,900,000
Allocation of goodwill to asset held for sale		394,000
Gain on sale and transfer of intangible assets	$ 2,500,000	$ 2,508,000

Sale of MRI Assets - Schedule o

Sale of MRI Assets - Schedule of Net Assets Sold (Detail) - Disposal Group, Held-for-sale, Not Discontinued Operations [Member] - VersaVue Software and DynaCAD Product and Related Assets [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Assets
Accounts Receivable	$ 116
Intangible assets	810
Allocated Goodwill	394
Total Assets	1,320
Liabilities
Deferred Revenue	746
Total Liabilities	746
Net Assets Sold	$ 574

Sale of MRI Assets - Schedule43

Sale of MRI Assets - Schedule of Components of Gain on Sale (Detail) - USD ($)	Jan. 30, 2017	Mar. 31, 2018	Mar. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received			$ 2,850,000
Asset Purchase Agreement [Member] | VersaVue Software and DynaCAD Product and Related Assets [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash received		$ 2,850,000
Holdback reserve	$ 350,000	350,000
Fair value of transition services		(118,000)
Net Assets sold		(574,000)
Total	$ 2,500,000	$ 2,508,000

Inventory - Additional Informat

Inventory - Additional Information (Detail) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Inventory reserve	$ 1.2	$ 1.2

Inventory - Schedule of Current

Inventory - Schedule of Current Inventory (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 993	$ 992
Work in process	133	63
Finished Goods	1,071	1,068
Inventory	$ 2,197	$ 2,123

Debt Financing - Additional Inf

Debt Financing - Additional Information (Detail) - USD ($)	3 Months Ended	6 Months Ended				12 Months Ended
	Mar. 31, 2018	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Jul. 30, 2019	Aug. 07, 2017
Debt Instrument [Line Items]
Maturity date of revolving loans and term loans	Mar. 1, 2022
Description on maturity date of revolving loans and term loans	The maturity date of the Revolving Loans and the Term Loans is March 1, 2022. However, the maturity date will become April 30, 2019, April 30, 2020 or April 30, 2021 if, on or before March 15, 2019, or 2020 or 2021, as applicable, the Company does not agree in writing to the Detection revenue and adjusted EBITDA covenant levels proposed by the Bank with respect to the upcoming applicable calendar year.
Termination fee percentage	2.00%
Accrued Final Payment	$ 66,000
Line of credit, closing costs	$ 74,000				$ 74,000
Debt instrument repayment term	36 months
Prime Rate [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	0.50%				0.50%
Minimum [Member]
Debt Instrument [Line Items]
Term loan advances prior to maturity	1.00%
Maximum [Member]
Debt Instrument [Line Items]
Term loan advances prior to maturity	3.00%
Term Loan A [Member]
Debt Instrument [Line Items]
Credit facility, contingent borrowing capacity	$ 3,000,000				$ 3,000,000
Accrued Final Payment	$ (66,000)
Term loan final payment percentage	8.00%				8.00%		6.00%
Term Loan A [Member] | Silicon Valley Bank [Member]
Debt Instrument [Line Items]
Credit facility							$ 6,000,000
Term Loan A [Member] | Silicon Valley Bank [Member] | Tranche One [Member]
Debt Instrument [Line Items]
Beginning date of repayment	Mar. 1, 2019
Term loan monthly installments	30
Term Loan A [Member] | Silicon Valley Bank [Member] | Tranche Two [Member]
Debt Instrument [Line Items]
Beginning date of repayment	Oct. 1, 2019
Term loan monthly installments	30
Term Loan A [Member] | Minimum [Member] | Silicon Valley Bank [Member]
Debt Instrument [Line Items]
Adjusted EBITDA requirement	$ (750,000)
Detection revenue					$ 8,622,000
Adjusted EBITDA					$ (4,500,000)
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Debt instrument, interest rate	1.50%				1.50%
Percentage of outstanding liabilities to bank	125.00%
Revolving Credit Facility [Member] | Silicon Valley Bank [Member]
Debt Instrument [Line Items]
Credit facility							$ 4,000,000
Scenario Forecast [Member] | Term Loan A [Member] | Minimum [Member] | Silicon Valley Bank [Member]
Debt Instrument [Line Items]
Net revenues						$ 21,500,000
Detection revenue		$ 9,517,000	$ 8,648,000	$ 8,373,000
Adjusted EBITDA		$ 1,000,000	$ (1,000,000)	$ (3,750,000)

Debt Financing - Schedule of Ca

Debt Financing - Schedule of Carrying Value of Term Loan Net of Debt Issuance Costs (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017
Shares Issued And Outstanding [Line Items]
Accrued Final Payment	$ (66)
Less current portion of Term Loan	(1,190)	$ (817)
Notes payable long-term portion	4,810	5,119
Term Loan A [Member]
Shares Issued And Outstanding [Line Items]
Principal Amount of Term Loan	6,000	6,000
Unamortized closing costs	(66)	(64)
Accrued Final Payment	66
Carrying amount of Term Loan	6,000	5,936
Carrying amount of Term Loan	6,000	5,936
Less current portion of Term Loan	(1,190)	(817)
Notes payable long-term portion	$ 4,810	$ 5,119

Debt Financing - Summary of Pri

Debt Financing - Summary of Principal and Interest Payments (Detail) - Term Loan A [Member] $ in Thousands	Mar. 31, 2018USD ($)
Shares Issued And Outstanding [Line Items]
2,018	$ 1,030
2,019	2,186
2,020	2,095
2,021	1,660
Total	$ 6,971

Debt Financing - Interest Expen

Debt Financing - Interest Expense in Consolidated Income Statement (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Interest Expense, Debt [Abstract]
Cash interest expense	$ 68
Final Payment accrual	66
Amortization of debt costs	7
Amortization of settlement obligations		$ 13
Interest expense capital lease	1
Capital lease - fair value amortization		(8)
Total interest expense	$ 142	$ 5

Lease Commitments - Additional

Lease Commitments - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Aug. 31, 2017
Leases [Abstract]
Operating leases expiring description	Facilities are leased under operating leases expiring at various dates through March 2020.
Rent expense	$ 222,000	$ 216,000
Equipment lease obligation payments	42,000		$ 50,000
Liability recorded on capital leases	$ 35,000		$ 42,000
Equipment expected life	3 years

Lease Commitments - Future Mini

Lease Commitments - Future Minimum Lease Payments under Operating Leases (Detail) $ in Thousands	Mar. 31, 2018USD ($)
Leases [Abstract]
2,018	$ 575
2,019	755
2,020	174
Total	$ 1,504

Lease Commitments - Schedule of

Lease Commitments - Schedule of Future Minimum Lease Payments under Capital Leases (Detail) - USD ($)	Mar. 31, 2018	Dec. 31, 2017	Aug. 31, 2017
Leases [Abstract]
2,018	$ 12,000
2,019	17,000
2,020	13,000
subtotal minimum lease obligation	42,000		$ 50,000
less interest	(7,000)
Total, net	35,000		42,000
Total, net	35,000		$ 42,000
less current portion	(13,000)
long term portion	$ 22,000	$ 27,000

Stock-Based Compensation - Addi

Stock-Based Compensation - Additional Information (Detail)	Mar. 22, 2018shares	Mar. 31, 2018USD ($)shares	Mar. 31, 2017USD ($)	Dec. 31, 2016shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options exercised | $		$ 0
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share based compensation vesting period		1 year
Number of installments		3
Aggregate intrinsic value of the options vested in period | $		$ 500,000	$ 300,000
Performance Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock granted	112,500	189,583		162,500
Performance Based Restricted Stock [Member] | Vesting Period One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares expected to vest		63,194
Performance Based Restricted Stock [Member] | Vesting Period Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares expected to vest		63,194
Performance Based Restricted Stock [Member] | Vesting Period Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares expected to vest		63,194
Performance Based Restricted Stock [Member] | Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares available for granted		108,333
Time Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of restricted stock granted	112,500	344,094
Number of installments	3
Black Scholes Model [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of option Granted		65,331

Stock-Based Compensation - Opti

Stock-Based Compensation - Options Granted under Company's Stock Incentive Plans, Valuation Assumptions and Fair Values (Detail) - Stock Options [Member] - $ / shares	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average risk-free interest rate	2.33%	1.48%
Expected dividend yield	0.00%	0.00%
Expected life	3 years 6 months	3 years 6 months
Weighted average exercise price	$ 3.08	$ 4.78
Weighted average fair value	$ 1.40	$ 2.45
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	60.80%	70.80%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	61.30%	72.00%

Stock-Based Compensation - Stoc

Stock-Based Compensation - Stock-Based Compensation Expense Including Options and Restricted Stock by Category (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	$ 391	$ 969
Cost of Revenue [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	1	2
Engineering and Product Development [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	97	205
Marketing and Sales [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense		223
General and Administrative Expense [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items]
Allocated share-based compensation expense	$ 293	$ 539

Stock-Based Compensation - Unre

Stock-Based Compensation - Unrecognized Compensation Cost Related to Unexercisable Options and Unvested Restricted Stock and Weighted Average Remaining Period (Detail) $ in Thousands	3 Months Ended
	Mar. 31, 2018USD ($)
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized [Abstract]
Remaining expense	$ 2,225
Weighted average term	1 year 2 months 12 days

Stock-Based Compensation - Aggr

Stock-Based Compensation - Aggregate Intrinsic Value (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Mar. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value, Stock option	$ 273	$ 1,425
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate intrinsic value, Restricted stock	$ 1,789	$ 2,039

Commitments and Contingencies -

Commitments and Contingencies - Additional Information (Detail) - USD ($)	1 Months Ended
	Jul. 31, 2017	Feb. 28, 2010	Mar. 31, 2018
Loss Contingencies [Line Items]
Purchase obligations to suppliers for future product deliverables			$ 1,100,000
CADx Medical Systems Inc [Member]
Loss Contingencies [Line Items]
Tax re-assessment received	$ 6,800,000
Reduced tax re-assessment received		$ 703,000

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities which are Measured at Fair Value on a Recurring Basis (Detail) - Fair Value, Measurements, Recurring [Member] - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Assets
Total Assets	$ 7,967	$ 8,853
Money Market Accounts [Member]
Assets
Total Assets	7,967	8,853
Level 1 [Member]
Assets
Total Assets	7,967	8,853
Level 1 [Member] | Money Market Accounts [Member]
Assets
Total Assets	$ 7,967	$ 8,853

Income Taxes - Additional Infor

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income tax provision	$ 13,000	$ 17,000
Unrecognized tax benefits	0
Deferred tax liability related to amortized goodwill	6,000
Deferred tax liability	$ 8,000

Goodwill - Additional Informati

Goodwill - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Mar. 31, 2018
Goodwill [Line Items]
Goodwill	$ 8,362		$ 8,362
Therapy [Member] | ASU 2017-04 [Member]
Goodwill [Line Items]
Fair value of goodwill	100	$ 3,500
Goodwill	2,100	7,500
Impairment loss	$ 1,700	$ 4,000

Goodwill - Roll Forward of Good

Goodwill - Roll Forward of Goodwill Activity by Reportable Segment (Detail) $ in Thousands	Mar. 31, 2018USD ($)
Goodwill [Line Items]
Goodwill, Beginning Balance	$ 8,362
Goodwill, Ending Balance	8,362
Detection [Member]
Goodwill [Line Items]
Goodwill, Beginning Balance	8,362
Goodwill, Ending Balance	$ 8,362

Goodwill - Annual Impairment As

Goodwill - Annual Impairment Assessment (Detail) - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Accumulated Goodwill	$ 54,906
Accumulated impairment	(46,544)
Goodwill, Ending Balance	8,362	$ 8,362
Detection [Member]
Goodwill [Line Items]
Accumulated Goodwill	699
Fair value allocation	7,663
Goodwill, Ending Balance	8,362	$ 8,362
Therapy [Member]
Goodwill [Line Items]
Accumulated Goodwill	6,270
Fair value allocation	13,446
Accumulated impairment	$ (19,716)

Long-lived Assets - Additional

Long-lived Assets - Additional Information (Detail) $ in Millions	3 Months Ended
	Sep. 30, 2017USD ($)
Therapy [Member]
Impaired Long-Lived Assets Held and Used [Line Items]
Impairment charges on long-lived assets	$ 0.7

Segment Reporting - Additional

Segment Reporting - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2018USD ($)Segment	Mar. 31, 2017USD ($)
Schedule Of Geographical Information [Line Items]
Number of reporting segments | Segment	2
Total Export Sales	$ 6,313,000	$ 6,791,000
Intersegment Eliminations [Member]
Schedule Of Geographical Information [Line Items]
Total Export Sales	$ 0

Segment Reporting - Summary of

Segment Reporting - Summary of Segment Revenues, Gross Profit, Segment Operating Income or Loss and Reconciliation of Segment Operating Income or Loss to GAAP Loss (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Segment revenues:
Total revenue	$ 6,313	$ 6,791
Segment gross profit:
Segment gross profit	4,498	4,689
Segment operating income (loss):
Segment operating income (loss)	(1,079)	(881)
General, administrative, depreciation and amortization expense	(2,069)	(2,062)
Interest expense	(142)	(5)
Gain on sale of MRI assets		2,508
Other income	22
Loss before income tax expense	(3,268)	(440)
Detection [Member]
Segment revenues:
Total revenue	4,011	4,489
Segment gross profit:
Segment gross profit	3,529	4,001
Segment operating income (loss):
Segment operating income (loss)	(13)	1,502
Therapy [Member]
Segment revenues:
Total revenue	2,302	2,302
Segment gross profit:
Segment gross profit	969	688
Segment operating income (loss):
Segment operating income (loss)	$ (1,066)	$ (2,383)